Internal Revenue Service website screenshot

Internal Revenue Service

The Internal Revenue Service (IRS) is the United States federal tax collection agency and a bureau of the Department of the Treasury. The IRS publishes developer resources for tax software providers and transmitters including the Modernized e-File (MeF) system for electronic tax return submission, the e-Services suite for authorized e-file providers, and Publication 4164 (the MeF Guide for Software Developers and Transmitters) which documents the XML schemas and transmission protocols required for integration.

Internal Revenue Service publishes 2 APIs on the APIs.io network. Tagged areas include Federal-Government, Finance, IRS, Tax, and Tax Filing.

Internal Revenue Service’s developer surface includes support and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub
9.8/100 minimal ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0
AccessFreemium
2 APIs
Federal-GovernmentFinanceIRSTaxTax Filing

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0
Composite quality — 9.8/100 · minimal
Contract Quality 0.0 / 21
Developer Ergonomics 0.8 / 17
Access Clarity 2.7 / 17
Operational Transparency 1.2 / 11
Contract Governance 0.0 / 10
Discoverability 5.0 / 9
Regulatory Posture 1.7 / 15
Agent readiness — 3/100 · 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
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.
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/.
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/internal-revenue-service: 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 2

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

IRS Modernized e-File (MeF)

The IRS Modernized e-File (MeF) system is the web-based electronic filing platform supporting individual, business, and tax-exempt return submission via XML-based schemas. Softw...

IRS e-Services

IRS e-Services is a suite of web-based products for tax professionals, reporting agents, and authorized e-file providers offering Transcript Delivery, TIN Matching, e-file appli...

Pricing Plans 1

Published pricing tiers and plan structures.

Internal Revenue Service Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Internal Revenue Service Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Internal Revenue Service Finops

FINOPS

Security Posture 1

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

Internal Revenue Service Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support
Support

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Other 1

Properties that don't map to a standard resource type

Developer
Developer

Source (apis.yml)

apis.yml Raw ↑ 
aid: internal-revenue-service
name: Internal Revenue Service
description: The Internal Revenue Service (IRS) is the United States federal tax collection agency and a bureau of the Department
  of the Treasury. The IRS publishes developer resources for tax software providers and transmitters including the Modernized
  e-File (MeF) system for electronic tax return submission, the e-Services suite for authorized e-file providers, and Publication
  4164 (the MeF Guide for Software Developers and Transmitters) which documents the XML schemas and transmission protocols
  required for integration.
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/internal-revenue-service.png
tags:
- Federal-Government
- Finance
- IRS
- Tax
- Tax Filing
tags_raw:
- Federal Government
- Finance
- IRS
- Tax
- Tax Filing
url: https://raw.githubusercontent.com/api-evangelist/internal-revenue-service/refs/heads/main/apis.yml
created: '2024-12-25'
modified: '2026-04-28'
specificationVersion: '0.23'
apis:
- aid: internal-revenue-service:modernized-e-file
  name: IRS Modernized e-File (MeF)
  description: The IRS Modernized e-File (MeF) system is the web-based electronic filing platform supporting individual, business,
    and tax-exempt return submission via XML-based schemas. Software developers and transmitters integrate with MeF to submit
    returns and receive acknowledgements.
  humanURL: https://www.irs.gov/e-file-providers/modernized-e-file-mef-internet-filing
  tags:
  - Federal-Government
  - Tax Filing
  tags_raw:
  - Federal Government
  - Tax Filing
  properties:
  - type: Documentation
    url: https://www.irs.gov/e-file-providers/modernized-e-file-mef-internet-filing
  - type: Schemas
    url: https://www.irs.gov/e-file-providers/modernized-e-file-mef-schemas-and-business-rules
  - type: Guide
    url: https://www.irs.gov/pub/irs-pdf/p4164.pdf
- aid: internal-revenue-service:e-services
  name: IRS e-Services
  description: IRS e-Services is a suite of web-based products for tax professionals, reporting agents, and authorized e-file
    providers offering Transcript Delivery, TIN Matching, e-file application management, and secure messaging for electronic
    interactions with the IRS.
  humanURL: https://www.irs.gov/tax-professionals/e-services
  tags:
  - Federal-Government
  - Tax Professionals
  tags_raw:
  - Federal Government
  - Tax Professionals
  properties:
  - type: Documentation
    url: https://www.irs.gov/tax-professionals/e-services
common:
- type: DomainSecurity
  url: security/internal-revenue-service-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/IRS-Public
- type: LinkedIn
  url: https://www.linkedin.com/company/irs
- type: Website
  url: https://www.irs.gov/
- type: Developer
  url: https://www.irs.gov/e-file-providers/software-developers
- type: Support
  url: https://www.irs.gov/help
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com