NMI

NMI is a global embedded payments enablement platform providing full-stack payment technology with REST APIs for payment processing, tokenization, recurring billing, customer vault management, and payment facilitation across ecommerce, in-person, mobile, and unattended acquisition channels. With over 20 years of operation, NMI connects 1.2 million active merchants, 6,000 channel partners, and 150+ processor connections, processing over $502 billion in annual payments volume.

NMI publishes 28 API contracts indexed on the APIs.io network, including Webhook Events API, Affiliates API, Apple Pay API, and 25 more. Tagged areas include Payments, Payment Gateway, Payment Processing, Tokenization, and Recurring Billing.

The NMI catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.

NMI’s developer surface includes authentication, developer portal, sandbox, support, engineering blog, and 33 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

50.1/100 developing ▬ flat Agent 45/100 agent native Front door AI 4/6 moderate Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessPaid

9 published contracts 1 MCP Servers

Payments Payment Gateway Payment Processing Tokenization Recurring BillingCustomer VaultFintech Embedded Payments Payment Facilitation

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 50.1/100 · developing

Contract Quality 15.0 / 19

Developer Ergonomics 7.3 / 15

Access Clarity 5.4 / 15

Operational Transparency 0.7 / 10

Contract Governance 2.0 / 9

Discoverability 7.0 / 8

Regulatory Posture 3.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 45/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Payments regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented) Ask about this →
Pagination +5 pts — share of collection GETs (an array, or one wrapped in data/items/results ...) that declare a page/limit/offset/cursor parameter, a Link header or a next/cursor field; na with no collection GETs Ask about this →
Agent Skills +5 pts — skills artifact present, graded by who authored it Ask about this →
Protected Resource Metadata +5 pts — a served /.well-known/oauth-protected-resource carrying `resource` (documented), and naming its authorization_servers (verified) Ask about this →

3 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 36.2 — up to +12.8 composite points Ask about this →
Operational Transparency scores 7.1 — up to +12.1 composite points Ask about this →
Developer Ergonomics scores 48.8 — up to +10.2 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/nmi/apis.yml: open an issue on github.com/api-evangelist/nmi to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Canada RPAA Payment Service Providers (Bank of Canada registry + Payments Canada)	mixed	41.0	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 3

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (platform)

OpenAPI

measured — observed by APIs.io (published)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 28

Individual APIs this provider publishes, each with its own machine-readable definition.

NMI Three Step Redirect API

The NMI Three Step Redirect API keeps merchants outside the scope of transmitting sensitive payment data by routing cardholder information directly to NMI servers. Supports tran...

NMI Customer-Present Cloud API

The NMI Customer-Present Cloud API enables browser-based point-of-sale payment processing without software installation. Supports cloud device registration and control, payment ...

NMI Webhook Events API

Here you can find information about webhook events

NMI Affiliates API

The Affiliates API from NMI — 1 operation(s) for affiliates.

NMI Apple Pay API

Here you can find information about endpoints that are related to Apple Pay.

NMI Applications API

Manage merchant applications

NMI Authentication API

The Authorization endpoint allows clients to securely authenticate and obtain an access token for making requests to the API.

NMI Authvia TXT2PAY API

Authvia TXT2PAY® allows your merchants to request payments by text, with no download required. With NMI’s seamless Authvia integration, you can enable your merchants to create n...

NMI Billing & Commission API

The Billing & Commission API from NMI — 2 operation(s) for billing & commission.

NMI Component Sessions API

The Component Sessions API from NMI — 1 operation(s) for component sessions.

NMI Customers API

Customer vault management endpoints

NMI Data and Transaction Reporting API

Query API (query.php) for retrieving transaction, subscription, and invoice data. Intended for existing Classic integrations.

NMI Devices API

Cloud device management and payment request endpoints

NMI Fee Schedule API

The Fee Schedule API from NMI — 2 operation(s) for fee schedule.

NMI Gateway Features API

Gateway Features

NMI Invoicing API

Invoice management endpoints

NMI Marketplace App API

The Marketplace App API from NMI — 1 operation(s) for marketplace app.

NMI Merchants API

The Merchants API from NMI — 4 operation(s) for merchants.

NMI Packages API

Get all the information required for application submissions

NMI Plans API

Recurring payment plan management endpoints

NMI Processors and Services API

Here you can find information about endpoints that provide general services that are useful across a variety workflows.

NMI Products API

Product management endpoints for the Product Manager

NMI Settlement Time API

The Settlement Time API from NMI — 1 operation(s) for settlement time.

NMI Subscriptions API

Subscription management endpoints

NMI Transactions API

Core payment processing operations including credit card, ACH, and cash transactions

NMI Users API

The Users API from NMI — 2 operation(s) for users.

NMI Webhook Events API

Here you can find information about webhook events

NMI Webhook Subscriptions API

Manage Webhook Subscriptions

Scroll for all 28

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

NMI MCP Server

Remote MCP server at docs.nmi.com over HTTP; 7 tools listed.

MCP SERVER

NMI API pricing

Not yet checked against NMI's own pricing page. Compiled by API Evangelist; confirm before you rely on a figure.

Plan	Price
Standard Gateway	—
Payment Facilitator (PayFac)	—
Enterprise / White-Label	—

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Plans

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Rate Limits

0 limits

RATE LIMITS

Terms of Service 1

What its API terms permit and prohibit, quoted from its own page.

NMI

9 quoted statements, read from NMI's own page on 2026-11-10.

TERMS

Privacy & Data 1

Its role, the data it processes, retention and transfers, quoted from its own privacy page.

NMI

31 quoted statements, read from NMI's own page on 2026-11-10.

PRIVACY

Eligibility 1

Who may sign up and where, quoted from its own terms.

NMI

1 quoted statement, read from NMI's own page on 2026-11-10.

ELIGIBILITY

Data License 1

How its data and outputs may be reused, quoted from its own terms.

NMI

2 quoted statements, read from NMI's own page on 2026-11-10.

LICENSE

FinOps 1

Cost, billing, and metering signals for API financial operations.

Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Nmi Webhooks

ASYNCAPI

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Nmi Context

120 classes · 423 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

NMI API Rules

13 rules · 6 error-severity 5 warn-severity 2 info-severity

SPECTRAL

JSON Schema 78

Standalone JSON Schema definitions for this provider's data models.

ACH - Credit

128 properties

JSON SCHEMA

ACH - Sale

128 properties

JSON SCHEMA

Add processor

20 properties

JSON SCHEMA

Response

34 properties

JSON SCHEMA

Adding Apple Pay to a Merchant

1 properties

JSON SCHEMA

Adding Apple Pay to a Merchant

1 properties

JSON SCHEMA

application-document

7 properties

JSON SCHEMA

Response

29 properties

JSON SCHEMA

Billing Address Response

16 properties

JSON SCHEMA

Lookup Card Type

1 properties

JSON SCHEMA

Response

0 properties

JSON SCHEMA

ConversationAmountInput

0 properties

JSON SCHEMA

ConversationCustomerPhoneWithDashes

0 properties

JSON SCHEMA

ConversationExpirationDateInput

0 properties

JSON SCHEMA

ConversationId

0 properties

JSON SCHEMA

ConversationInstructions

0 properties

JSON SCHEMA

Customer Vault Billing Request

17 properties

JSON SCHEMA

Create Customer Request

4 properties

JSON SCHEMA

Create Invoice Request

10 properties

JSON SCHEMA

Response

6 properties

JSON SCHEMA

Create a Merchant

19 properties

JSON SCHEMA

Response

29 properties

JSON SCHEMA

Credit Card - Capture

8 properties

JSON SCHEMA

Credit Card - Complete Partial Payment in Full

126 properties

JSON SCHEMA

Credit Card - Sale

127 properties

JSON SCHEMA

Customer Response

6 properties

JSON SCHEMA

Device List Response

5 properties

JSON SCHEMA

Device Response

15 properties

JSON SCHEMA

full-application

7 properties

JSON SCHEMA

Response

0 properties

JSON SCHEMA

Response

8 properties

JSON SCHEMA

Response

0 properties

JSON SCHEMA

Report Response

8 properties

JSON SCHEMA

Response

15 properties

JSON SCHEMA

Get Settlement Time Response

38 properties

JSON SCHEMA

Response

27 properties

JSON SCHEMA

Get Sub-Affiliate List

5 properties

JSON SCHEMA

Response

8 properties

JSON SCHEMA

Response

8 properties

JSON SCHEMA

Invoice Response

15 properties

JSON SCHEMA

NmiRecordId

0 properties

JSON SCHEMA

Collection of Fields

6 properties

JSON SCHEMA

package-fields

0 properties

JSON SCHEMA

pagination

4 properties

JSON SCHEMA

Device Payment Validate Request

16 properties

JSON SCHEMA

Payment Request Cancellation Response

4 properties

JSON SCHEMA

Payment Request Status Response

5 properties

JSON SCHEMA

PlanCreateRequest

4 properties

JSON SCHEMA

Plan Response

8 properties

JSON SCHEMA

Plan Update Request

5 properties

JSON SCHEMA

Product Create Request

11 properties

JSON SCHEMA

Product Response V5

13 properties

JSON SCHEMA

Product Update Request

10 properties

JSON SCHEMA

Prompt Request Status Response

6 properties

JSON SCHEMA

Pull All Fee Schedules

3 properties

JSON SCHEMA

Response

6 properties

JSON SCHEMA

Response - Customer Vault Report Type

1 properties

JSON SCHEMA

Response - Invoicing Report Type

1 properties

JSON SCHEMA

Response - Profile Report Type With Processor Details

1 properties

JSON SCHEMA

Response - Recurring Plans Report Type

1 properties

JSON SCHEMA

Response - Recurring Report Type

1 properties

JSON SCHEMA

Response

1 properties

JSON SCHEMA

Querying A Merchant's Apple Pay Status

1 properties

JSON SCHEMA

Response

19 properties

JSON SCHEMA

scope-types

0 properties

JSON SCHEMA

See Merchants' Billing

4 properties

JSON SCHEMA

Response

8 properties

JSON SCHEMA

See Merchants' Billing

4 properties

JSON SCHEMA

Response

8 properties

JSON SCHEMA

Subscription Create Request

7 properties

JSON SCHEMA

Subscription Response

9 properties

JSON SCHEMA

subscription

6 properties

JSON SCHEMA

Subscription Update Request

14 properties

JSON SCHEMA

Update Customer Request

4 properties

JSON SCHEMA

Update Customer Vault Billing Request

17 properties

JSON SCHEMA

Update Invoice Request

10 properties

JSON SCHEMA

Updating Settlement Time

1 properties

JSON SCHEMA

Response

38 properties

JSON SCHEMA

Scroll for all 78

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

NMI Authentication

apiKey/oauth2 · 2 schemes

SECURITY

NMI Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

NMI Scopes

6 scopes · clientCredentials

6 scopes

SCOPES

Agentic Access (API Evangelist recommendations) 1

Recommended x-agentic-access execution contracts for AI agents.

NMI Agentic Access

123 operations · 77 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

Portal

Portal

Integration Portal

Integration Portal

Sandbox

Sandbox

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

LLMsTxt

MCPServer

WellKnown

Design & Contract 9

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

Webhooks

DataModel

Idempotency

Conventions

ErrorCatalog

Conformance

Scroll for all 9

Build 1

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Access & Security 3

Authentication, authorization, and security posture

OAuthScopes

OAuthScopes

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

Support

Support

Contact

Contact

RateLimits

RateLimits

Commercial 6

Pricing, plans, and the legal terms of use

TermsOfService

PrivacyPolicy

Plans

FinOps

UsageTerms

DataLicense

Company 3

The organization behind the API

Newsroom

Newsroom

Website

Website

Blog

Blog

Other 6

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Leadership

Leadership

Developer Experience

Developer Experience

DataProcessing

DataProcessing

Eligibility

Eligibility

Source (apis.yml)

name: NMI
description: NMI is a global embedded payments enablement platform providing full-stack payment technology with REST APIs
  for payment processing, tokenization, recurring billing, customer vault management, and payment facilitation across ecommerce,
  in-person, mobile, and unattended acquisition channels. With over 20 years of operation, NMI connects 1.2 million active
  merchants, 6,000 channel partners, and 150+ processor connections, processing over $502 billion in annual payments volume.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/nmi.png
url: https://raw.githubusercontent.com/api-evangelist/nmi/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-09-16'
specificationVersion: '0.23'
x-docs-platform: readme
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-04
tags:
- Payments
- Payment Gateway
- Payment Processing
- Tokenization
- Recurring Billing
- Customer Vault
- Fintech
- Embedded Payments
- Payment Facilitation
maintainers:
- FN: API Evangelist
  url: https://apievangelist.com
  email: info@apievangelist.com
common:
- type: AgenticAccess
  url: agentic-access/nmi-agentic-access.yml
- type: Spectral
  url: rules/nmi-rules.yml
- type: JSONLD
  url: json-ld/nmi-context.jsonld
- type: Vocabulary
  url: vocabulary/nmi-vocabulary.yml
- type: Webhooks
  url: asyncapi/nmi-webhooks.yml
- type: DataModel
  url: data-model/nmi-data-model.yml
- type: Idempotency
  url: conventions/nmi-conventions.yml
- type: Conventions
  url: conventions/nmi-conventions.yml
- type: ErrorCatalog
  url: errors/nmi-problem-types.yml
- type: Conformance
  url: conformance/nmi-conformance.yml
- type: LLMsTxt
  url: llms/nmi-llms.txt
- type: MCPServer
  url: mcp/nmi-mcp.yml
- type: WellKnown
  url: well-known/nmi-well-known.yml
- type: Hosts
  url: hosts/nmi-hosts.yml
- type: Vendors
  url: vendors/nmi-vendors.yml
- type: TermsOfService
  url: https://www.nmi.com/terms-and-conditions/
- type: PrivacyPolicy
  url: https://www.nmi.com/policy/privacy/
- type: Newsroom
  url: https://www.nmi.com/about-us/news/
- type: Leadership
  url: https://www.nmi.com/about-us/leadership/
- type: OAuthScopes
  url: scopes/nmi-scopes.yml
- type: Authentication
  url: authentication/nmi-authentication.yml
- type: Website
  url: https://nmi.com
- type: DomainSecurity
  url: security/nmi-domain-security.yml
- type: Portal
  url: https://docs.nmi.com
- type: Developer Experience
  url: https://www.nmi.com/dev-experience/
- type: SDKs
  url: https://www.nmi.com/payment-gateway-sdks-apis/
- type: Integration Portal
  url: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
- type: Sandbox
  url: https://docs.nmi.com/docs/sandbox-testing
- type: Support
  url: https://support.nmi.com
- type: Blog
  url: https://www.nmi.com/blog/
- type: Contact
  url: https://www.nmi.com/about-us/contact-us/
- type: Plans
  url: https://raw.githubusercontent.com/api-evangelist/nmi/refs/heads/main/plans/plans.yml
- type: RateLimits
  url: https://raw.githubusercontent.com/api-evangelist/nmi/refs/heads/main/rate-limits/rate-limits.yml
- type: FinOps
  url: https://raw.githubusercontent.com/api-evangelist/nmi/refs/heads/main/finops/finops.yml
- type: UsageTerms
  url: terms/nmi-terms-of-service.yml
- type: DataProcessing
  url: privacy/nmi-privacy-policy.yml
- type: Eligibility
  url: eligibility/nmi-eligibility.yml
- type: DataLicense
  url: data-license/nmi-data-license.yml
apis:
- name: NMI Three Step Redirect API
  description: The NMI Three Step Redirect API keeps merchants outside the scope of transmitting sensitive payment data by
    routing cardholder information directly to NMI servers. Supports transaction, recurring billing, and customer vault operations
    with reduced PCI compliance scope for merchants.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Payments
  - PCI Compliance
  - Redirect
  - Tokenization
  properties:
  - type: Documentation
    url: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  contact:
  - FN: NMI Developer Support
    url: https://support.nmi.com
    email: ''
  aid: nmi:nmi-three-step-redirect-api
- name: NMI Customer-Present Cloud API
  description: The NMI Customer-Present Cloud API enables browser-based point-of-sale payment processing without software
    installation. Supports cloud device registration and control, payment requests on connected devices, device prompts including
    menu, signature, and yes/no interactions, and QR code display for in-person payment scenarios.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.nmi.com/docs/introduction-to-the-customer-present-cloud-api
  baseURL: https://secure.networkmerchants.com
  tags:
  - In-Person Payments
  - Point-of-Sale
  - Device Management
  - Cloud POS
  tags_raw:
  - In-Person Payments
  - Point of Sale
  - Device Management
  - Cloud POS
  properties:
  - type: Documentation
    url: https://docs.nmi.com/docs/introduction-to-the-customer-present-cloud-api
  contact:
  - FN: NMI Developer Support
    url: https://support.nmi.com
    email: ''
  aid: nmi:nmi-customer-present-cloud-api
- aid: nmi:nmi-payments-api
  name: NMI Webhook Events API
  description: Here you can find information about webhook events
  humanURL: https://docs.nmi.com/reference/getting-started
  baseURL: https://secure.networkmerchants.com
  tags:
  - Webhook Events
  properties:
  - type: OpenAPI
    url: openapi/nmi-payments-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-get-transaction-data-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-get-merchant-list-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-assign-fee-schedule-to-merchant-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-create-merchant-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-get-specific-merchant-information-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-get-merchant-processors-and-value-added-services-details-response-schema.json
- aid: nmi:nmi-affiliates-api
  name: NMI Affiliates API
  description: The Affiliates API from NMI — 1 operation(s) for affiliates.
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Affiliates
  properties:
  - type: OpenAPI
    url: openapi/nmi-affiliates-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-get-sub-affiliates-list-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-get-sub-affiliates-list-request-schema.json
- aid: nmi:nmi-apple-pay-api
  name: NMI Apple Pay API
  description: Here you can find information about endpoints that are related to Apple Pay.
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Apple Pay
  properties:
  - type: OpenAPI
    url: openapi/nmi-apple-pay-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-querying-amerchants-apple-pay-status200-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-adding-apple-pay-to-amerchant-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-adding-apple-pay-to-amerchant-request-schema.json
- aid: nmi:nmi-applications-api
  name: NMI Applications API
  description: Manage merchant applications
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Application
  tags_raw:
  - Applications
  properties:
  - type: OpenAPI
    url: openapi/nmi-applications-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-application-document-schema.json
  - type: JSONSchema
    url: json-schema/nmi-full-application-schema.json
  - type: JSONSchema
    url: json-schema/nmi-pagination-schema.json
- aid: nmi:nmi-authentication-api
  name: NMI Authentication API
  description: The Authorization endpoint allows clients to securely authenticate and obtain an access token for making requests
    to the API.
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/nmi-authentication-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-scope-types-schema.json
- aid: nmi:nmi-authvia-txt2pay-api
  name: NMI Authvia TXT2PAY API
  description: Authvia TXT2PAY® allows your merchants to request payments by text, with no download required. With NMI’s seamless
    Authvia integration, you can enable your merchants to create new text conversations, list and filter conversations, retrieve
    details for a specific conversation, and close conversations that are no longer needed.
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Authvia TXT2PAY
  properties:
  - type: OpenAPI
    url: openapi/nmi-authvia-txt2pay-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-conversation-amount-input-schema.json
  - type: JSONSchema
    url: json-schema/nmi-conversation-expiration-date-input-schema.json
  - type: JSONSchema
    url: json-schema/nmi-conversation-instructions-schema.json
  - type: JSONSchema
    url: json-schema/nmi-nmi-record-id-schema.json
  - type: JSONSchema
    url: json-schema/nmi-conversation-id-schema.json
  - type: JSONSchema
    url: json-schema/nmi-conversation-customer-phone-with-dashes-schema.json
- aid: nmi:nmi-billing-commission-api
  name: NMI Billing & Commission API
  description: The Billing & Commission API from NMI — 2 operation(s) for billing & commission.
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Billing & Commission
  properties:
  - type: OpenAPI
    url: openapi/nmi-billing-commission-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-see-your-commission-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-see-merchant-billing-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-see-merchant-billing-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-see-your-commission-request-schema.json
- aid: nmi:nmi-component-sessions-api
  name: NMI Component Sessions API
  description: The Component Sessions API from NMI — 1 operation(s) for component sessions.
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Component Sessions
  properties:
  - type: OpenAPI
    url: openapi/nmi-component-sessions-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
- aid: nmi:nmi-customers-api
  name: NMI Customers API
  description: Customer vault management endpoints
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Customers
  properties:
  - type: OpenAPI
    url: openapi/nmi-customers-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-update-customer-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-customer-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-create-customer-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-create-customer-billing-schema.json
  - type: JSONSchema
    url: json-schema/nmi-update-customer-vault-billing-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-billing-address-response-schema.json
- aid: nmi:nmi-data-and-transaction-reporting-api
  name: NMI Data and Transaction Reporting API
  description: Query API (query.php) for retrieving transaction, subscription, and invoice data. Intended for existing Classic
    integrations.
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Data and Transaction Reporting
  properties:
  - type: OpenAPI
    url: openapi/nmi-data-and-transaction-reporting-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-query-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-query-customer-vault-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-query-invoicing-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-query-profile-with-processor-details-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-query-recurring-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-query-recurring-plan-response-schema.json
- aid: nmi:nmi-devices-api
  name: NMI Devices API
  description: Cloud device management and payment request endpoints
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Devices
  properties:
  - type: OpenAPI
    url: openapi/nmi-devices-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-payment-request-status-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-device-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-prompt-request-status-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-payment-device-validate-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-device-list-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-payment-request-cancellation-response-schema.json
- aid: nmi:nmi-fee-schedule-api
  name: NMI Fee Schedule API
  description: The Fee Schedule API from NMI — 2 operation(s) for fee schedule.
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Fee Schedule
  properties:
  - type: OpenAPI
    url: openapi/nmi-fee-schedule-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-get-fees-in-schedule-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-pull-all-fee-schedules-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-pull-all-fee-schedules-request-schema.json
- aid: nmi:nmi-gateway-features-api
  name: NMI Gateway Features API
  description: Gateway Features
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Gateway Features
  properties:
  - type: OpenAPI
    url: openapi/nmi-gateway-features-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-get-transaction-data-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-get-merchant-list-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-assign-fee-schedule-to-merchant-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-create-merchant-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-get-specific-merchant-information-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-updating-settlement-time-response-schema.json
- aid: nmi:nmi-invoicing-api
  name: NMI Invoicing API
  description: Invoice management endpoints
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Invoicing
  properties:
  - type: OpenAPI
    url: openapi/nmi-invoicing-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-invoice-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-update-invoice-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-create-invoice-request-schema.json
- aid: nmi:nmi-marketplace-app-api
  name: NMI Marketplace App API
  description: The Marketplace App API from NMI — 1 operation(s) for marketplace app.
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Marketplace App
  properties:
  - type: OpenAPI
    url: openapi/nmi-marketplace-app-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
- aid: nmi:nmi-merchants-api
  name: NMI Merchants API
  description: The Merchants API from NMI — 4 operation(s) for merchants.
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Merchants
  properties:
  - type: OpenAPI
    url: openapi/nmi-merchants-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-get-merchant-list-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-assign-fee-schedule-to-merchant-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-create-merchant-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-get-specific-merchant-information-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-create-merchant-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-create-merchant-keys-response-schema.json
- aid: nmi:nmi-packages-api
  name: NMI Packages API
  description: Get all the information required for application submissions
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Packages
  properties:
  - type: OpenAPI
    url: openapi/nmi-packages-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-package-fields-schema.json
  - type: JSONSchema
    url: json-schema/nmi-package-collection-schema.json
  - type: JSONSchema
    url: json-schema/nmi-pagination-schema.json
- aid: nmi:nmi-plans-api
  name: NMI Plans API
  description: Recurring payment plan management endpoints
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Plans
  properties:
  - type: OpenAPI
    url: openapi/nmi-plans-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-plan-create-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-plan-update-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-plan-response-schema.json
- aid: nmi:nmi-processors-and-services-api
  name: NMI Processors and Services API
  description: Here you can find information about endpoints that provide general services that are useful across a variety
    workflows.
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Processors and Services
  properties:
  - type: OpenAPI
    url: openapi/nmi-processors-and-services-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-get-merchant-processors-and-value-added-services-details-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-add-processor-service-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-add-processor-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-get-processor-config-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-check-available-services-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-card-type-lookup-request-schema.json
- aid: nmi:nmi-products-api
  name: NMI Products API
  description: Product management endpoints for the Product Manager
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Product
  tags_raw:
  - Products
  properties:
  - type: OpenAPI
    url: openapi/nmi-products-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-product-create-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-product-update-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-product-response-v5-schema.json
- aid: nmi:nmi-settlement-time-api
  name: NMI Settlement Time API
  description: The Settlement Time API from NMI — 1 operation(s) for settlement time.
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Settlement Time
  properties:
  - type: OpenAPI
    url: openapi/nmi-settlement-time-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-updating-settlement-time-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-get-settlement-time-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-updating-settlement-time-request-schema.json
- aid: nmi:nmi-subscriptions-api
  name: NMI Subscriptions API
  description: Subscription management endpoints
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Subscription
  tags_raw:
  - Subscriptions
  properties:
  - type: OpenAPI
    url: openapi/nmi-subscriptions-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-subscription-create-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-subscription-update-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-subscription-response-schema.json
- aid: nmi:nmi-transactions-api
  name: NMI Transactions API
  description: Core payment processing operations including credit card, ACH, and cash transactions
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Transaction
  tags_raw:
  - Transactions
  properties:
  - type: OpenAPI
    url: openapi/nmi-transactions-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-response-schema.json
  - type: JSONSchema
    url: json-schema/nmi-credit-card-payment-in-full-partial-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-credit-card-sale-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-achcredit-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-achsale-request-schema.json
  - type: JSONSchema
    url: json-schema/nmi-credit-card-capture-request-schema.json
- aid: nmi:nmi-users-api
  name: NMI Users API
  description: The Users API from NMI — 2 operation(s) for users.
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/nmi-users-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-get-merchant-or-partner-user-info-response-schema.json
- aid: nmi:nmi-webhook-events-api
  name: NMI Webhook Events API
  description: Here you can find information about webhook events
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Webhook Events
  properties:
  - type: OpenAPI
    url: openapi/nmi-webhook-events-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
- aid: nmi:nmi-webhook-subscriptions-api
  name: NMI Webhook Subscriptions API
  description: Manage Webhook Subscriptions
  humanURL: https://secure.networkmerchants.com/gw/merchants/resources/integration/integration_portal.php
  baseURL: https://secure.networkmerchants.com
  tags:
  - Webhook Subscriptions
  properties:
  - type: OpenAPI
    url: openapi/nmi-webhook-subscriptions-api-openapi.yml
  - type: Documentation
    url: https://docs.nmi.com/docs
  - type: Sandbox
    url: https://docs.nmi.com/docs/sandbox-testing
  - type: JSONSchema
    url: json-schema/nmi-subscription-schema.json
  - type: JSONSchema
    url: json-schema/nmi-pagination-schema.json
x-readme-harvest:
  date: '2026-10-14'
  ops: 108
  tool: harvest-readme-openapi.py
  portal: https://docs.nmi.com

NMI API — frequently asked questions

Does NMI have an API?

Yes. APIs.io lists 28 APIs from NMI, including NMI Three Step Redirect API, NMI Customer-Present Cloud API and NMI Webhook Events API, and 25 more.

Is there an OpenAPI specification for the NMI API?

Yes. APIs.io indexes 26 OpenAPI specifications for NMI, each linked for download from this page.

How do I authenticate with the NMI API?

NMI uses bearer-token authentication (apiKey/oauth2 · 2 schemes). The details are profiled on APIs.io as NMI Authentication.

How much does the NMI API cost?

APIs.io lists 3 pricing plans for NMI, with each plan's price, limits and inclusions under Pricing on this page.

Does NMI have an MCP server?

Yes. APIs.io lists 1 MCP server for NMI: Remote MCP server at docs.nmi.com over HTTP; 7 tools listed.

Is the NMI API ready for AI agents?

NMI has a Kin Score of 50.1 out of 100 (developing) and an Agent Readiness score of 44.5 (agent-native), scored by API Evangelist on 2026-11-13.

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