# TaxRock Delegate API

> Read a TaxRock user's tax-compliance data on that user's behalf.

## Docs

- [Look up client account by EIN](https://docs.taxrock.com/api-reference/client-accounts/look-up-client-account-by-ein.md): Looks up the client account containing a business with the given EIN and returns a client-account-wide compliance summary, including every taxpayer on the account plus any not-yet-onboarded pending taxpayers. Returns 200 for any well-formed EIN; `result` is null and `currentStatus.status` is `NotMon…
- [Look up client account by EIN](https://docs.taxrock.com/api-reference/client-accounts/lookup-by-ein.md): Looks up the client account containing a business with the given EIN and returns a client-account-wide compliance summary, including every taxpayer on the account plus any not-yet-onboarded pending taxpayers. Returns 200 for any well-formed EIN; `result` is null and `currentStatus.status` is `NotMon…
- [Look up taxpayer by EIN](https://docs.taxrock.com/api-reference/taxpayers/look-up-taxpayer-by-ein.md): Looks up the single business taxpayer with the given EIN and returns its compliance summary. The single-taxpayer counterpart to the client-account lookup. Returns 200 for any well-formed EIN; `result` is null when no accessible business has that EIN.
- [Look up taxpayer by EIN](https://docs.taxrock.com/api-reference/taxpayers/lookup-by-ein.md): Looks up the single business taxpayer with the given EIN and returns its compliance summary. The single-taxpayer counterpart to the client-account lookup. Returns 200 for any well-formed EIN; `result` is null when no accessible business has that EIN.
- [Changelog](https://docs.taxrock.com/changelog.md): Changes to the TaxRock Delegate API. Notable changes are also emailed to integration partners.
- [Authentication](https://docs.taxrock.com/concepts/authentication.md): OAuth 2.0 Authorization Code with PKCE, refresh tokens, and reconnects.
- [Compliance status](https://docs.taxrock.com/concepts/compliance-status.md): The currentStatus object, status values, badges, and how taxpayers are identified.
- [TaxRock Delegate API](https://docs.taxrock.com/introduction.md): Read a TaxRock user's tax-compliance data on that user's behalf, after one-time consent.
- [Quickstart](https://docs.taxrock.com/quickstart.md): From zero to a successful EIN lookup.

## OpenAPI Specs

- [openapi](https://docs.taxrock.com/api-reference/openapi.json)