IRS

The US Internal Revenue Service (IRS) provides REST APIs and Application-to-Application (A2A) interfaces for tax information access, identity verification, income verification, information return filing, and taxpayer account data. Authorized applications can integrate with IRS e-Services for TIN matching, the Transcript Delivery System (TDS), the Income Verification Express Service (IVES), the Information Return Intake System (IRIS) for 1099 series filings, and the Modernized e-File (MeF) system for electronic tax return submission. Access requires enrollment in IRS e-Services and obtaining an API client ID.

IRS is listed with 5 APIs on the APIs.io network. Tagged areas include IRS, Tax, Federal Government, TIN Matching, and Income Verification.

IRS’s developer surface includes documentation, getting-started guide, engineering blog, and 11 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

18.9/100 emerging ▬ flat Agent 1/100 human only Front door AI 1/6 silent Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFree

5 APIs

IRS Tax Federal GovernmentTIN MatchingIncome VerificationInformation ReturnsE-File Identity VerificationTaxpayerFinance Tax Filing

Kin Score

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

Composite quality — 18.9/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 5.7 / 17

Access Clarity 2.7 / 17

Operational Transparency 2.6 / 11

Contract Governance 0.0 / 10

Discoverability 6.1 / 9

Regulatory Posture 0.9 / 15

Agent readiness — 1/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 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

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 Government & Public Sector 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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

12 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 15.8 — up to +16.8 composite points
Developer Ergonomics scores 33.3 — up to +13.3 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/irs/apis.yml: open an issue on github.com/api-evangelist/irs 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
Biometrics Testing (biometric recognition vendors, identity verification depth)	builds-on	17.2 (thin)	-	-
US Federal API Programs (api.data.gov, Login.gov, GSA MAS, FedRAMP)	builds-on	17.2 (thin)	-	-

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.

APIs 5

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

IRS TIN Matching API

Allows payers to submit Taxpayer Identification Number (TIN) and name combinations to be matched against IRS records before filing information returns. Supports interactive matc...

IRS Income Verification Express Service (IVES) API

Application-to-Application (A2A) API allowing authorized participants such as lenders, banks, credit unions, and financial institutions to request IRS tax transcripts for income...

IRS Information Return Intake System (IRIS) API

Application-to-Application (A2A) API for electronic filing of 1099 series information returns directly with the IRS. Supports high-volume automated submission by software develo...

IRS Modernized e-File (MeF) API

Application-to-Application (A2A) system enabling authorized software developers and transmitters to electronically submit tax returns directly to the IRS. Supports individual an...

IRS Transcript Delivery System (TDS) API

e-Services API allowing authorized tax professionals and institutions to retrieve tax transcripts programmatically. Part of the IRS e-Services suite alongside TIN Matching and t...

IRS API pricing

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

Plan	Price
Free Tier (e-Services)	—
IVES Participant Plan	—

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Irs Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Irs Rate Limits

2 limits

RATE LIMITS

FinOps 1

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

Irs Finops

FINOPS

Security Posture 1

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

Irs Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

TermsOfService

TermsOfService

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: irs
name: IRS
description: The US Internal Revenue Service (IRS) provides REST APIs and Application-to-Application (A2A) interfaces for
  tax information access, identity verification, income verification, information return filing, and taxpayer account data.
  Authorized applications can integrate with IRS e-Services for TIN matching, the Transcript Delivery System (TDS), the Income
  Verification Express Service (IVES), the Information Return Intake System (IRIS) for 1099 series filings, and the Modernized
  e-File (MeF) system for electronic tax return submission. Access requires enrollment in IRS e-Services and obtaining an
  API client ID.
type: Index
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: free
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Free
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/irs.png
url: https://raw.githubusercontent.com/api-evangelist/irs/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.23'
tags:
- IRS
- Tax
- Federal Government
- TIN Matching
- Income Verification
- Information Returns
- E-File
- Identity Verification
- Taxpayer
- Finance
- Tax Filing
tags_raw:
- IRS
- Tax
- Federal Government
- TIN Matching
- Income Verification
- Information Returns
- e-File
- Identity Verification
- Taxpayer
- Federal-Government
- Finance
- Tax Filing
apis:
- aid: irs:tin-matching
  name: IRS TIN Matching API
  description: Allows payers to submit Taxpayer Identification Number (TIN) and name combinations to be matched against IRS
    records before filing information returns. Supports interactive matching of up to 25 combinations with immediate results
    and bulk matching of up to 100,000 combinations with results within 24 hours. Available as part of IRS e-Services.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.irs.gov/tax-professionals/taxpayer-identification-number-tin-matching
  baseURL: https://la.www4.irs.gov
  tags:
  - TIN Matching
  - Taxpayer Identification
  - Information Returns
  - Validation
  properties:
  - type: Documentation
    url: https://www.irs.gov/tax-professionals/taxpayer-identification-number-tin-matching
  - type: GettingStarted
    url: https://www.irs.gov/tax-professionals/get-an-api-client-id
- aid: irs:ives
  name: IRS Income Verification Express Service (IVES) API
  description: Application-to-Application (A2A) API allowing authorized participants such as lenders, banks, credit unions,
    and financial institutions to request IRS tax transcripts for income verification purposes. Supports high-volume automated
    transcript requests with delivery in hours. Charges $4 per transcript requested. Requires IVES participant enrollment
    and API client ID.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.irs.gov/individuals/income-verification-express-service-for-participants
  baseURL: https://la.www4.irs.gov
  tags:
  - Income Verification
  - Tax Transcripts
  - Mortgage
  - Lending
  - Financial Services
  tags_raw:
  - Income Verification
  - Tax Transcripts
  - Mortgage
  - Lending
  - Financial Services
  - Financial-Services
  properties:
  - type: Documentation
    url: https://www.irs.gov/individuals/income-verification-express-service-for-participants
  - type: GettingStarted
    url: https://www.irs.gov/tax-professionals/get-an-api-client-id
  - type: Pricing
    url: plans/irs-plans-pricing.yml
- aid: irs:iris
  name: IRS Information Return Intake System (IRIS) API
  description: Application-to-Application (A2A) API for electronic filing of 1099 series information returns directly with
    the IRS. Supports high-volume automated submission by software developers and large-scale filers. Specifications are documented
    in IRS Publication 5718 (IRIS Electronic Filing A2A Specifications). Launched in January 2023 as the successor to the
    FIRE system.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.irs.gov/newsroom/irs-opens-free-portal-to-file-information-returns-new-electronic-option-can-reduce-millions-of-paper-forms-1099-estimated-to-be-filed-by-businesses-in-2023
  baseURL: https://la.www4.irs.gov
  tags:
  - 1099
  - Information Returns
  - E-File
  - Tax Filing
  tags_raw:
  - 1099
  - Information Returns
  - e-File
  - Tax Filing
  properties:
  - type: Documentation
    url: https://www.irs.gov/e-file-providers/information-and-technical-guidance-for-software-developers-and-transmitters
  - type: GettingStarted
    url: https://www.irs.gov/tax-professionals/get-an-api-client-id
- aid: irs:mef
  name: IRS Modernized e-File (MeF) API
  description: Application-to-Application (A2A) system enabling authorized software developers and transmitters to electronically
    submit tax returns directly to the IRS. Supports individual and business tax forms including Form 2290, Form 720, Form
    8849, and more. Requires TLS 1.2 or higher. Technical specifications available in IRS Publication 4164. Current WSDL version
    is R10.9 for tax year 2025/processing year 2026.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.irs.gov/e-file-providers/information-and-technical-guidance-for-software-developers-and-transmitters
  baseURL: https://la.www4.irs.gov
  tags:
  - E-File
  - Tax Returns
  - Electronic Filing
  - Software Developers
  tags_raw:
  - e-File
  - Tax Returns
  - Electronic Filing
  - Software Developers
  properties:
  - type: Documentation
    url: https://www.irs.gov/e-file-providers/information-and-technical-guidance-for-software-developers-and-transmitters
  - type: GettingStarted
    url: https://www.irs.gov/tax-professionals/get-an-api-client-id
  - type: StatusPage
    url: https://www.irs.gov/e-file-providers/modernized-e-file-mef-status
- aid: irs:tds
  name: IRS Transcript Delivery System (TDS) API
  description: e-Services API allowing authorized tax professionals and institutions to retrieve tax transcripts programmatically.
    Part of the IRS e-Services suite alongside TIN Matching and the Secure Object Repository (SOR). Requires API client ID
    obtained through IRS e-Services enrollment.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.irs.gov/tax-professionals/get-an-api-client-id
  baseURL: https://la.www4.irs.gov
  tags:
  - Tax Transcripts
  - e-Services
  - Tax Professionals
  properties:
  - type: Documentation
    url: https://www.irs.gov/tax-professionals/get-an-api-client-id
  - type: GettingStarted
    url: https://www.irs.gov/tax-professionals/get-an-api-client-id
common:
- type: DomainSecurity
  url: security/irs-domain-security.yml
- type: Website
  url: https://www.irs.gov/
- type: Documentation
  url: https://www.irs.gov/tax-professionals/get-an-api-client-id
- type: GettingStarted
  url: https://www.irs.gov/tax-professionals/get-an-api-client-id
- type: DeveloperPortal
  url: https://www.irs.gov/e-file-providers/information-and-technical-guidance-for-software-developers-and-transmitters
- type: StatusPage
  url: https://www.irs.gov/e-file-providers/modernized-e-file-mef-status
- type: Plans
  url: plans/irs-plans-pricing.yml
- type: RateLimits
  url: rate-limits/irs-rate-limits.yml
- type: FinOps
  url: finops/irs-finops.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/irs
- type: X
  url: https://x.com/irsnews
- type: Blog
  url: https://www.irs.gov/newsroom
- type: TermsOfService
  url: https://www.irs.gov/privacy-disclosure/irs-website-privacy-policy-statement
- type: GitHubOrganization
  url: https://github.com/IRS-Public
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

IRS API — frequently asked questions

Does IRS have an API?

Yes. APIs.io lists 5 APIs from IRS, including IRS TIN Matching API, IRS Income Verification Express Service (IVES) API and IRS Information Return Intake System (IRIS) API, and 2 more.

How much does the IRS API cost?

APIs.io lists 2 pricing plans for IRS, with each plan's price, limits and inclusions under Pricing on this page.

Is the IRS API ready for AI agents?

IRS has a Kin Score of 18.9 out of 100 (emerging) and an Agent Readiness score of 0.6 (human-only), scored by API Evangelist on 2026-11-06.

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