Primer

Primer is a payment orchestration platform that enables merchants to build flexible payment flows across multiple processors through a single REST API integration. The platform provides intelligent routing, automatic fallback logic, fraud detection integrations, and a no-code Workflows builder for managing payment rules without engineering effort. Primer supports 60+ payment methods including cards, digital wallets, and regional alternatives such as iDEAL, Klarna, and Alipay. The platform delivers unified observability, reconciliation, and analytics across all connected payment providers, and processes billions of dollars monthly with 99.99% uptime.

Primer publishes 5 APIs on the APIs.io network, including Client Session API API, Dispute & Chargebacks Webhooks API, Payment Methods API API, and 2 more. Tagged areas include payments, payment orchestration, payment processing, fintech, and fraud detection.

The Primer catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Primer’s developer surface includes authentication, documentation, engineering blog, pricing, changelog, and 19 more developer resources.

🌐 Visit website 📡 Source on GitHub

52.8/100 developing ▼ -6.7 Agent 41/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessPaidSelf serve

5 APIs

paymentspayment orchestrationpayment processingfintechfraud detectionsmart routingcheckoutpayment methodsreconciliationwebhooks

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 52.8/100 · developing

Contract Quality 16.0 / 25

Developer Ergonomics 4.3 / 20

Commercial Clarity 9.5 / 20

Operational Transparency 8.9 / 13

Governance 8.3 / 12

Discoverability 7.4 / 10

Agent readiness — 41/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/primer: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 5

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

Rate Limits 1

Documented rate limits and quota policies.

Primer Rate Limits

3 limits

RATE LIMITS

FinOps 1

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

JSON Schema 5

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

Examples 27

Example request and response payloads for these APIs.

Scroll for all 27

Documentation 6

Reference material describing how the API behaves

Documentation

JSONSchema

JSONSchema

JSONSchema

JSONSchema

JSONSchema

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Vocabulary

Vocabulary

JSONLDContext

JSONLDContext

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

StatusPage

StatusPage

ChangeLog

ChangeLog

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: primer
name: Primer
type: Index
accessModel:
  pricing: paid
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Paid · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/primer.png
url: https://raw.githubusercontent.com/api-evangelist/primer/refs/heads/main/apis.yml
created: 2026-06-12
modified: 2026-06-12
specificationVersion: '0.19'
description: 'Primer is a payment orchestration platform that enables merchants to build flexible payment flows across multiple
  processors through a single REST API integration. The platform provides intelligent routing, automatic fallback logic, fraud
  detection integrations, and a no-code Workflows builder for managing payment rules without engineering effort. Primer supports
  60+ payment methods including cards, digital wallets, and regional alternatives such as iDEAL, Klarna, and Alipay. The platform
  delivers unified observability, reconciliation, and analytics across all connected payment providers, and processes billions
  of dollars monthly with 99.99% uptime.

  '
tags:
- payments
- payment orchestration
- payment processing
- fintech
- fraud detection
- smart routing
- checkout
- payment methods
- reconciliation
- webhooks
apis:
- aid: primer:primer-client-session-api-api
  name: Primer Client Session API API
  description: The Client Session API API from Primer — 1 operation(s) for client session api.
  humanURL: https://primer.io/docs/api-reference/get-started/overview
  baseURL: https://api.primer.io
  tags:
  - Client Session API
  properties:
  - type: OpenAPI
    url: openapi/primer-client-session-api-api-openapi.yml
  - type: Documentation
    url: https://primer.io/docs/api-reference/get-started/overview
  - type: Sandbox
    url: https://api.sandbox.primer.io
- aid: primer:primer-dispute-chargebacks-webhooks-api
  name: Primer Dispute & Chargebacks Webhooks API
  description: The Dispute & Chargebacks Webhooks API from Primer — 2 operation(s) for dispute & chargebacks webhooks.
  humanURL: https://primer.io/docs/api-reference/get-started/overview
  baseURL: https://api.primer.io
  tags:
  - Dispute & Chargebacks Webhooks
  properties:
  - type: OpenAPI
    url: openapi/primer-dispute-chargebacks-webhooks-api-openapi.yml
  - type: Documentation
    url: https://primer.io/docs/api-reference/get-started/overview
  - type: Sandbox
    url: https://api.sandbox.primer.io
- aid: primer:primer-payment-methods-api-api
  name: Primer Payment Methods API API
  description: The Payment Methods API API from Primer — 4 operation(s) for payment methods api.
  humanURL: https://primer.io/docs/api-reference/get-started/overview
  baseURL: https://api.primer.io
  tags:
  - Payment Methods API
  properties:
  - type: OpenAPI
    url: openapi/primer-payment-methods-api-api-openapi.yml
  - type: Documentation
    url: https://primer.io/docs/api-reference/get-started/overview
  - type: Sandbox
    url: https://api.sandbox.primer.io
- aid: primer:primer-payment-webhooks-api
  name: Primer Payment Webhooks API
  description: The Payment Webhooks API from Primer — 2 operation(s) for payment webhooks.
  humanURL: https://primer.io/docs/api-reference/get-started/overview
  baseURL: https://api.primer.io
  tags:
  - Payment Webhooks
  properties:
  - type: OpenAPI
    url: openapi/primer-payment-webhooks-api-openapi.yml
  - type: Documentation
    url: https://primer.io/docs/api-reference/get-started/overview
  - type: Sandbox
    url: https://api.sandbox.primer.io
- aid: primer:primer-payments-api-api
  name: Primer Payments API API
  description: The Payments API API from Primer — 8 operation(s) for payments api.
  humanURL: https://primer.io/docs/api-reference/get-started/overview
  baseURL: https://api.primer.io
  tags:
  - Payments API
  properties:
  - type: OpenAPI
    url: openapi/primer-payments-api-api-openapi.yml
  - type: Documentation
    url: https://primer.io/docs/api-reference/get-started/overview
  - type: Sandbox
    url: https://api.sandbox.primer.io
common:
- type: AgenticAccess
  url: agentic-access/primer-agentic-access.yml
- type: TrustCenter
  url: security/primer-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/primer-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/primer-domain-security.yml
- type: Authentication
  url: authentication/primer-authentication.yml
- type: Website
  url: https://primer.io/
- type: Documentation
  url: https://primer.io/docs/api-reference/get-started/overview
- type: GitHubOrganization
  url: https://github.com/primer-io
- type: LinkedIn
  url: https://www.linkedin.com/company/primerapi/
- type: X
  url: https://x.com/primer_io
- type: Blog
  url: https://primer.io/blog
- type: Pricing
  url: https://primer.io/blog/primer-launches-primer-for-growth
- type: StatusPage
  url: https://status.primer.io/
- type: ChangeLog
  url: https://primer.io/docs/changelogs/android-sdk
- type: Plans
  url: plans/primer-plans-pricing.yml
- type: RateLimits
  url: rate-limits/primer-rate-limits.yml
- type: FinOps
  url: finops/primer-finops.yml
- type: JSONSchema
  url: json-schema/primer-clientsession.json
- type: JSONSchema
  url: json-schema/primer-paymentcreation.json
- type: JSONSchema
  url: json-schema/primer-payment.json
- type: JSONSchema
  url: json-schema/primer-paymentrefund.json
- type: JSONSchema
  url: json-schema/primer-paymentcapture.json
- type: Vocabulary
  url: vocabulary/primer-vocabulary.yml
- type: JSONLDContext
  url: json-ld/primer-context.jsonld
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Primer

APIs 5

Pricing Plans 1

Rate Limits 1

FinOps 1

Semantic Vocabularies 1

Spectral Rules 1

JSON Schema 5

Examples 27

Security Posture 4

Agentic Access 1

Documentation 6

Agent Surfaces 1

Design & Contract 2

Build 1

Access & Security 4

Operate 3

Commercial 3

Company 3

Other 1

Source (apis.yml)