# Fastn API

**Canonical:** https://apis.io/apis/fastn/fastn-api/  
**Provider:** Fastn — https://apis.io/providers/fastn/  
**Base URL:** https://api.fastn.dev  
**Documentation:** https://docs.fastn.ai/reference/api

Fastn API is one of 2 APIs that [Fastn](https://apis.io/providers/fastn/) 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.

Fastn API as documented publicly: 14 operations. Contract generated from the documentation by API Evangelist (2026-10-20); not the provider's own document.

## Operations (14)

| Method | Path | Summary |
|---|---|---|
| POST | `/` | POST / |
| GET | `/api/v1/embed/iframe` | Get embed iframe URL |
| POST | `/api/v1/embed/token` | Mint an embed token |
| POST | `/api/v1/embed/token/refresh` | Refresh an embed token |
| GET | `/api/v1/unified/{category}/{entity}` | List unified entities |
| POST | `/api/v1/unified/{category}/{entity}` | Create a unified entity record |
| GET | `/api/v1/unified/{category}/{entity}/{recordid}` | Retrieve a single unified record |
| POST | `/api/v1/workflows/{workflowid}/execute` | Execute a workflow |
| GET | `/build/unified-apis.md` | Unified APIs |
| GET | `/embed/embedding/sdk.md` | Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters |
| GET | `/fastn-workspace` | GET /fastn-workspace |
| GET | `/reference/errors.md` | Errors and failure states |
| GET | `/reference/faqs.md` | FAQs |
| GET | `/reference/glossary.md` | Glossary |

## Machine-readable artifacts (7)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/fastn/refs/heads/main/openapi/_ae-authored/fastn-openapi-generated.yml
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/fastn/refs/heads/main/json-schema/fastn-post-api-v1-embed-token-response-schema.json
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/fastn/refs/heads/main/json-schema/fastn-post-api-v1-embed-token-request-schema.json
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/fastn/refs/heads/main/json-schema/fastn-post-api-v1-workflows-workflowid-execute-response-schema.json
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/fastn/refs/heads/main/json-schema/fastn-post-api-v1-embed-token-refresh-response-schema.json
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/fastn/refs/heads/main/json-schema/fastn-post-request-schema.json
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/fastn/refs/heads/main/json-schema/fastn-post-api-v1-workflows-workflowid-execute-request-schema.json

## Other Fastn APIs (1)

- [Fastn API](https://apis.io/apis/fastn/fastn-api-2/)

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