# satohub-ai Signing API

**Canonical:** https://apis.io/apis/satohub-ai/satohub-ai-signing-api/  
**Provider:** satohub-ai — https://apis.io/providers/satohub-ai/  
**Base URL:** https://satohub.ai  
**Documentation:** https://satohub.ai/docs/api

satohub-ai Signing API is one of 21 APIs that [satohub-ai](https://apis.io/providers/satohub-ai/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. This API exposes 6 JSON Schema definitions. Tagged areas include signing. The published artifact set on APIs.io includes an OpenAPI specification and 6 JSON Schemas.

Response signing. Every Preflight verdict and every Sato Route decision is returned with a detached Ed25519 signature — `Sato-Signature` over the exact response bytes plus `Sato-Signed-At`, and the same signature under `meta.signature` for clients that only see the JSON. Keys are published as a JWK Set; the construction is published beside them. A valid signature proves origin, integrity and the stamped time. It is not a safety claim and it does not make a verdict more true. `meta.signature: null` with no header means the deployment has no signing key — unknown, never a placeholder.

## Operations (4)

| Method | Path | Summary |
|---|---|---|
| GET | `/.well-known/jwks.json` | Public keys that verify signed responses |
| GET | `/.well-known/sato-score-roots.json` | The daily Merkle roots over every published Sato Score |
| GET | `/api/verify/{slug}/proof` | A Merkle proof that one listing's Sato Score was in that day's published root |
| GET | `/.well-known/sato-signing.json` | What is signed, how, and for how long the keys stay checkable |

## Machine-readable artifacts (7)

- **OpenAPI** — https://artifacts.apis.io/satohub-ai/openapi/satohub-ai-signing-api-openapi.yml
- **JSONSchema** — https://artifacts.apis.io/satohub-ai/json-schema/satohub-ai-version-schema.json
- **JSONSchema** — https://artifacts.apis.io/satohub-ai/json-schema/satohub-ai-interpretation-schema.json
- **JSONSchema** — https://artifacts.apis.io/satohub-ai/json-schema/satohub-ai-needs-input-schema.json
- **JSONSchema** — https://artifacts.apis.io/satohub-ai/json-schema/satohub-ai-scan-recipient-schema.json
- **JSONSchema** — https://artifacts.apis.io/satohub-ai/json-schema/satohub-ai-token-resolve-schema.json
- **JSONSchema** — https://artifacts.apis.io/satohub-ai/json-schema/satohub-ai-swap-receipt-schema.json

## Other satohub-ai APIs (12)

- [satohub-ai Agent Economy API](https://apis.io/apis/satohub-ai/satohub-ai-agent-economy-api/)
- [satohub-ai Badges API](https://apis.io/apis/satohub-ai/satohub-ai-badges-api/)
- [satohub-ai Check API](https://apis.io/apis/satohub-ai/satohub-ai-check-api/)
- [satohub-ai Claims API](https://apis.io/apis/satohub-ai/satohub-ai-claims-api/)
- [satohub-ai Create API](https://apis.io/apis/satohub-ai/satohub-ai-create-api/)
- [satohub-ai Directory API](https://apis.io/apis/satohub-ai/satohub-ai-directory-api/)
- [satohub-ai Erc8004 API](https://apis.io/apis/satohub-ai/satohub-ai-erc8004-api/)
- [satohub-ai Listings API](https://apis.io/apis/satohub-ai/satohub-ai-listings-api/)
- [satohub-ai Preflight API](https://apis.io/apis/satohub-ai/satohub-ai-preflight-api/)
- [satohub-ai Projects API](https://apis.io/apis/satohub-ai/satohub-ai-projects-api/)
- [satohub-ai Registry API](https://apis.io/apis/satohub-ai/satohub-ai-registry-api/)
- [satohub-ai Resolve API](https://apis.io/apis/satohub-ai/satohub-ai-resolve-api/)

## Tags

signing

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