# Payer API

**Canonical:** https://apis.io/apis/payer/payer-api/  
**Provider:** Payer — https://apis.io/providers/payer/  
**Base URL:** https://b2b.payer.se  
**Documentation:** https://docs.developerhub.io/api/ref

Payer API is one of 2 APIs that [Payer](https://apis.io/providers/payer/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. This API exposes 6 JSON Schema definitions. The published artifact set on APIs.io includes an OpenAPI specification and 6 JSON Schemas.

Payer API as documented publicly: 33 operations. Contract generated from the documentation by API Evangelist (2026-10-15); not the provider's own document.

## Operations (33)

| Method | Path | Summary |
|---|---|---|
| GET | `/` | GET / |
| GET | `/all` | Get all resources |
| POST | `/api/v1/events/callbacks` | Subscribe to events |
| GET | `/api/v1/page` | GET /api/v1/page |
| GET | `/api/v2/orders/invoices` | Returns an invoice for a given invoice number. |
| POST | `/api/v2/orders/invoices/credit/{creditid}` | Returns a credit invoice for the full amount of the provided invoice. |
| PUT | `/api/v2/orders/invoices/send` | Sends a copy of an invoice. |
| GET | `/api/v2/orders/invoices/{invoiceid}` | Returns invoices with invoice number >= than given invoice number. |
| POST | `/api/v2/orders/invoices/{invoiceid}` | Pays an invoice with an outstanding amount from a credit invoice. |
| POST | `/api/v3/invoices` | POST /api/v3/invoices |
| GET | `/audit` | Get audit log |
| GET | `/changelog/{id}/post` | List changelog posts |
| POST | `/changelog/{id}/post` | Create a changelog post |
| POST | `/documentation/{id}/page` | Create a page |
| GET | `/export` | Exports project |
| POST | `/oauth2/token` | POST /oauth2/token |
| GET | `/page` | Get page by slug |
| DELETE | `/page/{id}` | Delete a page |
| GET | `/page/{id}` | Read page |
| PUT | `/page/{id}` | Update a page |
| PUT | `/page/{id}/publish` | Publish a page |
| GET | `/reader-access` | Get access details of all invited readers |
| PATCH | `/reader-access` | Revoke access to reader |
| POST | `/reader-access` | Grant access to reader |
| GET | `/reference/{id}/definition` | Read a reference specification |
| PUT | `/reference/{id}/publish` | Publish a reference draft |
| GET | `/search` | Search content |
| GET | `/users` | Get users |
| GET | `/version` | Lists all project versions |
| PUT | `/version/{id}` | Update a version |
| POST | `/version/{id}/clone` | Clone a version |
| GET | `/version/{id}/{id}` | Get broken links report |
| POST | `/version/{versionid}/reference` | Adds or updates a reference specification |

## Machine-readable artifacts (7)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/payer/refs/heads/main/openapi/_ae-authored/payer-openapi-generated.yml
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/payer/refs/heads/main/json-schema/payer-put-api-v2-orders-invoices-send-request-schema.json
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/payer/refs/heads/main/json-schema/payer-post-api-v2-orders-invoices-credit-creditid-request-schema.json
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/payer/refs/heads/main/json-schema/payer-post-api-v2-orders-invoices-invoiceid-request-schema.json
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/payer/refs/heads/main/json-schema/payer-post-oauth2-token-response-schema.json
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/payer/refs/heads/main/json-schema/payer-post-api-v2-orders-invoices-credit-creditid-response-schema.json
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/payer/refs/heads/main/json-schema/payer-get-api-v2-orders-invoices-invoiceid-response-schema.json

## Other Payer APIs (1)

- [Payer API](https://apis.io/apis/payer/payer-api-2/)

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