Zamp

Zamp provides a fully managed sales tax compliance platform with a robust API that enables businesses to automate sales tax calculations, filing, and remittance across the United States and Canada. Their solution includes features such as nexus tracking, exemption certificate management, and integration with major e‑commerce and accounting platforms. Zamp’s API trial is publicly available, allowing developers to test and integrate sales tax functionality quickly and securely.

Zamp is listed with 8 APIs on the APIs.io network, including Addresses API, Calculations API, and 6 more. Tagged areas include Company, Sales Tax, Automation, and Compliance.

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

Zamp’s developer surface includes changelog, authentication, documentation, API reference, getting-started guide, support, engineering blog, and 28 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

39.7/100 developing ▼ -11.0 Agent 33/100 agent ready Heartbeat 63/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFree

8 APIs 1 MCP Servers

Company Sales Tax Automation Compliance

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 39.7/100 · developing

Contract Quality 4.9 / 19

Developer Ergonomics 5.5 / 15

Access Clarity 9.1 / 15

Operational Transparency 3.3 / 10

Contract Governance 2.0 / 9

Discoverability 4.8 / 8

Regulatory Posture 3.2 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 33/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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):

Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
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)

8 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 26.2 — up to +18.5 composite points
Developer Ergonomics scores 36.9 — up to +12.6 composite points
Contract Governance scores 22.0 — up to +9.4 composite points

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.

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/zamp/apis.yml: open an issue on github.com/api-evangelist/zamp 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 →

Standards implemented 2

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 (documented)

OpenAPI

measured — observed by APIs.io (published)

APIs 8

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

Zamp API

Zamp provides a developer API documented at the API Reference page.

Zamp Addresses API

The Addresses API from Zamp — 1 operation(s) for addresses.

Zamp Calculations API

The Calculations API from Zamp — 1 operation(s) for calculations.

Zamp Companies API

The Companies API from Zamp — 1 operation(s) for companies.

Zamp Filings API

The Filings API from Zamp — 1 operation(s) for filings.

Zamp Registrations API

The Registrations API from Zamp — 1 operation(s) for registrations.

Zamp Tax Codes API

The Tax Codes API from Zamp — 1 operation(s) for tax codes.

Zamp Transactions API

The Transactions API from Zamp — 1 operation(s) for transactions.

Scroll for all 8

MCP Servers 1

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

Zamp MCP Server

Remote MCP server at developer.zamp.com.

MCP SERVER

Zamp API pricing

Prices published by Zamp, read 2026-10-28 from zamp.com/pricing. A free plan or tier is listed.

Plan	Price
Free	Free Includes: One-time nexus assessment, product taxability assessment, historical liability exposure analysis, ex
U.S.	Contact sales Includes: All the features of Free, plus calculations, nexus monitoring, registrations, filing & remittance, n
U.S. + Canada	Contact sales Includes: All the features of U.S., plus Canadian GST/HST/PST/QST coverage

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Zamp Plans Pricing

3 plans

PLANS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Zamp

SLA

FinOps 1

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

Zamp Finops

FINOPS

Semantic Vocabularies 1

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

Zamp Context

10 classes · 32 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Zamp API Rules

42 rules · 40 errors 1 warnings 1 info

SPECTRAL

JSON Schema 6

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

GetFilingsResponse

3 properties

JSON SCHEMA

GetRegistrationsResponse

4 properties

JSON SCHEMA

PostCalculationsRequest

10 properties

JSON SCHEMA

PostCalculationsResponse

4 properties

JSON SCHEMA

PostTransactionsRequest

13 properties

JSON SCHEMA

PostTransactionsResponse

4 properties

JSON SCHEMA

Security Posture 3

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

Zamp Authentication

1 scheme

SECURITY

Zamp Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Zamp Trust Center

SOC 2, GDPR

SECURITY

Agentic Access 1

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

Zamp Agentic Access

9 operations · 4 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

LLMsTxt

MCPServer

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conventions

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

Postman

Postman

Access & Security 6

Authentication, authorization, and security posture

SecurityTxt

Compliance

Authentication

SecurityTxt

TrustCenter

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

StatusPage

StatusPage

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

FinOps

TermsOfService

Plans

Pricing

Company 3

The organization behind the API

Newsroom

Newsroom

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: zamp
name: Zamp
accessModel:
  pricing: free
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Free
  confidence: medium
  probe_state: none
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://cdn.prod.website-files.com/69f3731843be4ce24ae7dea2/6a038f9f6176eacfdaa7dbe4_last-sales-n-scaled.jpg
description: Zamp provides a fully managed sales tax compliance platform with a robust API that enables businesses to automate
  sales tax calculations, filing, and remittance across the United States and Canada. Their solution includes features such
  as nexus tracking, exemption certificate management, and integration with major e‑commerce and accounting platforms. Zamp’s
  API trial is publicly available, allowing developers to test and integrate sales tax functionality quickly and securely.
url: https://raw.githubusercontent.com/api-evangelist/zamp/refs/heads/main/apis.yml
x-type: company
x-source: harvest:tag-qc
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-15 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-14'
modified: '2026-10-14'
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-17
tags:
- Company
- Sales Tax
- Automation
- Compliance
tags_raw:
- Company
- SalesTax
- API
- Automation
- Compliance
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/zamp-agentic-access.yml
- type: FinOps
  url: finops/zamp-finops.yml
- type: SecurityTxt
  url: well-known/zamp-zamp-security.txt
- type: TermsOfService
  url: https://zamp.com/terms-conditions
- type: Plans
  url: plans/zamp-plans-pricing.yml
- type: Spectral
  url: rules/zamp-rules.yml
- type: JSONLD
  url: json-ld/zamp-context.jsonld
- type: Vocabulary
  url: vocabulary/zamp-vocabulary.yml
- type: DataModel
  url: data-model/zamp-data-model.yml
- type: ChangeLog
  url: changelog/zamp-changelog.yml
- type: Conventions
  url: conventions/zamp-conventions.yml
- type: Compliance
  url: https://zamp.com/privacy-policy
- type: Authentication
  url: authentication/zamp-authentication.yml
- type: Conformance
  url: conformance/zamp-conformance.yml
- type: LLMsTxt
  url: llms/zamp-llms.txt
- type: AgentCard
  url: a2a/zamp-a2a.yml
- type: MCPServer
  url: mcp/zamp-mcp.yml
- type: SecurityTxt
  url: well-known/zamp-support-security.txt
- type: WellKnown
  url: well-known/zamp-well-known.yml
- type: Hosts
  url: hosts/zamp-hosts.yml
- type: Vendors
  url: vendors/zamp-vendors.yml
- type: StatusPage
  url: https://zamp.statuspage.io/
- type: Newsroom
  url: https://zamp.com/press
- type: TrustCenter
  url: security/zamp-trust-center.yml
- type: DomainSecurity
  url: security/zamp-domain-security.yml
- type: Website
  url: https://zamp.com
- type: DeveloperPortal
  url: https://developer.zamp.com
- type: Documentation
  url: https://developer.zamp.com/llms.txt
- type: APIReference
  url: https://developer.zamp.com/api-reference/introduction
- type: GettingStarted
  url: https://developer.zamp.com/guides/quickstart
- type: Support
  url: https://developer.zamp.com/guides/common-faqs
- type: Blog
  url: https://zamp.com/blog
- type: Pricing
  url: https://zamp.com/pricing
- type: SignUp
  url: https://developer.zamp.com/guides/trial
- type: Postman
  url: https://www.postman.com/zamp/workspace
apis:
- name: Zamp API
  description: Zamp provides a developer API documented at the API Reference page.
  humanURL: https://developer.zamp.com/api-reference/introduction
  baseURL: null
  x-coverage:
    state: unreadable
    reason: no-machine-readable-spec
    detail: No OpenAPI, AsyncAPI, GraphQL, gRPC, or WSDL contract found despite documented API reference.
    evidence:
    - url: https://api.zamp.com/openapi.json
      status: 404
    checked: '2026-10-14'
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/zamp-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-registrations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-filings-response-schema.json
  aid: zamp:zamp-api
- aid: zamp:zamp-addresses-api
  name: Zamp Addresses API
  description: The Addresses API from Zamp — 1 operation(s) for addresses.
  humanURL: https://developer.zamp.com/api-reference/introduction
  baseURL: https://api.zamp.com
  tags:
  - Addresses
  properties:
  - type: OpenAPI
    url: openapi/zamp-addresses-api-openapi.yml
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-registrations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-filings-response-schema.json
- aid: zamp:zamp-calculations-api
  name: Zamp Calculations API
  description: The Calculations API from Zamp — 1 operation(s) for calculations.
  humanURL: https://developer.zamp.com/api-reference/introduction
  baseURL: https://api.zamp.com
  tags:
  - Calculations
  properties:
  - type: OpenAPI
    url: openapi/zamp-calculations-api-openapi.yml
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-registrations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-filings-response-schema.json
- aid: zamp:zamp-companies-api
  name: Zamp Companies API
  description: The Companies API from Zamp — 1 operation(s) for companies.
  humanURL: https://developer.zamp.com/api-reference/introduction
  baseURL: https://api.zamp.com
  tags:
  - Companies
  properties:
  - type: OpenAPI
    url: openapi/zamp-companies-api-openapi.yml
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-registrations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-filings-response-schema.json
- aid: zamp:zamp-filings-api
  name: Zamp Filings API
  description: The Filings API from Zamp — 1 operation(s) for filings.
  humanURL: https://developer.zamp.com/api-reference/introduction
  baseURL: https://api.zamp.com
  tags:
  - Filings
  properties:
  - type: OpenAPI
    url: openapi/zamp-filings-api-openapi.yml
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-registrations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-filings-response-schema.json
- aid: zamp:zamp-registrations-api
  name: Zamp Registrations API
  description: The Registrations API from Zamp — 1 operation(s) for registrations.
  humanURL: https://developer.zamp.com/api-reference/introduction
  baseURL: https://api.zamp.com
  tags:
  - Registrations
  properties:
  - type: OpenAPI
    url: openapi/zamp-registrations-api-openapi.yml
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-registrations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-filings-response-schema.json
- aid: zamp:zamp-tax-codes-api
  name: Zamp Tax Codes API
  description: The Tax Codes API from Zamp — 1 operation(s) for tax codes.
  humanURL: https://developer.zamp.com/api-reference/introduction
  baseURL: https://api.zamp.com
  tags:
  - Tax Codes
  properties:
  - type: OpenAPI
    url: openapi/zamp-tax-codes-api-openapi.yml
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-registrations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-filings-response-schema.json
- aid: zamp:zamp-transactions-api
  name: Zamp Transactions API
  description: The Transactions API from Zamp — 1 operation(s) for transactions.
  humanURL: https://developer.zamp.com/api-reference/introduction
  baseURL: https://api.zamp.com
  tags:
  - Transaction
  tags_raw:
  - Transactions
  properties:
  - type: OpenAPI
    url: openapi/zamp-transactions-api-openapi.yml
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-request-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-calculations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-post-transactions-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-registrations-response-schema.json
  - type: JSONSchema
    url: json-schema/zamp-get-filings-response-schema.json
x-coverage:
  state: none
  reason: no-developer-program
  method: derived
  generated: '2026-10-15'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company publishes no developer documentation host and no machine-readable contract on its own domain
  evidence:
  - url: https://developer.zamp.com/mcp
    status: null
  - url: https://zamp.com
    status: 200
x-enrichment:
  date: '2026-10-15'
  status: enriched
  artifacts_added: 34
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Zamp API — frequently asked questions

Does Zamp have an API?

Yes. APIs.io lists 8 APIs from Zamp, including Zamp API, Zamp Addresses API and Zamp Calculations API, and 5 more.

Is there an OpenAPI specification for the Zamp API?

Yes. APIs.io indexes 8 OpenAPI specifications for Zamp, each linked for download from this page.

How do I authenticate with the Zamp API?

Zamp uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as Zamp Authentication.

How much does the Zamp API cost?

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

Does Zamp have an MCP server?

Yes. APIs.io lists 1 MCP server for Zamp: Remote MCP server at developer.zamp.com.

Is the Zamp API ready for AI agents?

Zamp has a Kin Score of 39.7 out of 100 (developing) and an Agent Readiness score of 32.5 (agent-ready), scored by API Evangelist on 2026-11-06.

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