# IRS TIN Matching API

**Canonical:** https://apis.io/apis/irs/tin-matching/  
**Provider:** IRS — https://apis.io/providers/irs/  
**Base URL:** https://la.www4.irs.gov  
**Documentation:** https://www.irs.gov/tax-professionals/taxpayer-identification-number-tin-matching

IRS TIN Matching API is one of 5 APIs that [IRS](https://apis.io/providers/irs/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include TIN Matching, Taxpayer Identification, Information Returns, and Validation. The published artifact set on APIs.io includes API documentation and a getting-started guide.

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.

## Machine-readable artifacts (3)

- **Documentation** — https://www.irs.gov/tax-professionals/taxpayer-identification-number-tin-matching
- **GettingStarted** — https://www.irs.gov/tax-professionals/get-an-api-client-id
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/irs/refs/heads/main/apis.yml

## Other IRS APIs (4)

- [IRS Income Verification Express Service (IVES) API](https://apis.io/apis/irs/ives/)
- [IRS Information Return Intake System (IRIS) API](https://apis.io/apis/irs/iris/)
- [IRS Modernized e-File (MeF) API](https://apis.io/apis/irs/mef/)
- [IRS Transcript Delivery System (TDS) API](https://apis.io/apis/irs/tds/)

## Tags

TIN Matching, Taxpayer Identification, Information Returns, Validation

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/irs/tin-matching/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/irs/.