# Nacha Proof of Authorization API

**Canonical:** https://apis.io/apis/nacha/nacha-proof-of-authorization-api/  
**Provider:** Nacha — https://apis.io/providers/nacha/  
**Base URL:** https://api.asig.org/v1  
**Documentation:** https://app.swaggerhub.com/apis/ASIG/Initiate_Payment/1.0.7

Nacha Proof of Authorization API is one of 19 APIs that [Nacha](https://apis.io/providers/nacha/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Proof of Authorization. The published artifact set on APIs.io includes an OpenAPI specification, an API reference, and API documentation.

The Proof of Authorization API from Nacha — 1 operation(s) for proof of authorization.

## Operations (1)

| Method | Path | Summary |
|---|---|---|
| POST | `/documents/proofofauth` | — |

## Machine-readable artifacts (26)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/nacha/refs/heads/main/openapi/nacha-proof-of-authorization-api-openapi.yml
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Initiate_Payment/1.0.7
- **Documentation** — https://www.nacha.org/content/apis-development
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/IAR/1.0.1
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/IAR_Plus/1.0.1
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/transaction_status/1.0.14
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Initiate_Wire_Payment_API/1.0.3
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Get_Wire_Status_API/1.0.0
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Initiate_Instant_Payment_API/1.0.6
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Instant_Payment_Transfer/1.0.1
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Initiate_Payment_API/1.0.2
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/RET_API/1.0.3
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Authorize_To_Pay/1.0.6
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Pay_Me_API/1.0.11
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/account_validation/1.0.2
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Account_Validation_Plus_Ownership_API/1.1.0
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Account_Validation_Plus_Name_and_RET/1.0.4
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/RealTimeBillingAccountValidation/1.0.7
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Get_Corporate_Account_Balances_API/1.0.3
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Get_Corporate_Transaction_History_API/1.0.5
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Get_Transaction_Detail_API/1.0.4
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Payee_Profile_API/2.1.3
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Written_Statement_of_Unauthorized_Debit/1.0.8
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Proof_of_Authorization/1.0.6
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/bank_contacts/1.0.5
- **APIReference** — https://app.swaggerhub.com/apis/ASIG/Bank_Contact_V2/1.0.9

## Other Nacha APIs (12)

- [Nacha Account Validation API](https://apis.io/apis/nacha/nacha-account-validation-api/)
- [Nacha Accounts API](https://apis.io/apis/nacha/nacha-accounts-api/)
- [Nacha ACH Payments API](https://apis.io/apis/nacha/nacha-ach-payments-api/)
- [Nacha ACH Transaction Status API](https://apis.io/apis/nacha/nacha-ach-transaction-status-api/)
- [Nacha Authorize to Pay API](https://apis.io/apis/nacha/nacha-authorize-to-pay-api/)
- [Nacha Banks API](https://apis.io/apis/nacha/nacha-banks-api/)
- [Nacha Expand Bank Contact V2 API](https://apis.io/apis/nacha/nacha-expand-bank-contact-v2-api/)
- [Nacha Get Corporate Account Balances API](https://apis.io/apis/nacha/nacha-get-corporate-account-balances-api/)
- [Nacha Get Corporate Transaction History API](https://apis.io/apis/nacha/nacha-get-corporate-transaction-history-api/)
- [Nacha Get Participants Profile API](https://apis.io/apis/nacha/nacha-get-participants-profile-api/)
- [Nacha Initiate Payment API](https://apis.io/apis/nacha/nacha-initiate-payment-api/)
- [Nacha Instant Payment API](https://apis.io/apis/nacha/nacha-instant-payment-api/)

## Tags

Proof of Authorization

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