# VouchSpec Agent Skill Evidence API

**Canonical:** https://apis.io/apis/plyrium-com/vouchspec-agent-skill-evidence-api/  
**Provider:** Plyrium — https://apis.io/providers/plyrium-com/  
**Base URL:** https://vouchspec.plyrium.com  
**Documentation:** https://www.plyrium.com/vouchspec

VouchSpec Agent Skill Evidence API is published by [Plyrium](https://apis.io/providers/plyrium-com/) on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Agent Skills, Supply Chain Security, Software Provenance, x402, and Signed Receipts. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, and a getting-started guide.

Agent-only API for purchasing fresh, isolated static validation and signed evidence for one exact immutable public GitHub Agent Skill commit. Free anonymous discovery and verification operations (health, discovery, x402 manifest, issuer key, immutable DSSE receipt bytes, live receipt status) plus one x402-paid purchase operation settling 0.25 USDC on Base mainnet (eip155:8453). No human checkout, no uploads, no private repositories; artifact code is never executed.

## Operations (8)

| Method | Path | Summary |
|---|---|---|
| GET | `/api/vouchspec/v1/health` | Check whether commerce is operational |
| GET | `/api/vouchspec/v1/discovery` | Get the canonical VouchSpec machine contract |
| GET | `/.well-known/x402` | Get the x402 payment manifest |
| GET | `/api/vouchspec/v1/validate` | Check the validation service and discover its paid POST operation |
| POST | `/api/vouchspec/v1/validate` | Purchase validation for one exact public Agent Skill commit |
| GET | `/api/vouchspec/v1/keys/issuer` | Get the current Ed25519 receipt-verification key |
| GET | `/api/vouchspec/v1/receipts/{sha256_hex}` | Fetch immutable DSSE receipt bytes by SHA-256 digest |
| GET | `/api/vouchspec/v1/receipts/{sha256_hex}/status` | Check the live reliance status for a receipt |

## Machine-readable artifacts (18)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/plyrium-com/refs/heads/main/openapi/plyrium-com-vouchspec-openapi.yml
- **OpenAPI** — https://vouchspec.plyrium.com/openapi.json
- **Documentation** — https://www.plyrium.com/vouchspec
- **APIReference** — https://vouchspec.plyrium.com/openapi.json
- **GettingStarted** — https://vouchspec.plyrium.com/.well-known/skills/vouchspec-verify-before-install/SKILL.md
- **Discovery** — https://vouchspec.plyrium.com/api/vouchspec/v1/discovery
- **TermsOfService** — https://www.plyrium.com/vouchspec/policies
- **LLMsTxt** — https://raw.githubusercontent.com/api-evangelist/plyrium-com/refs/heads/main/llms/plyrium-com-llms.txt
- **MCPServer** — https://raw.githubusercontent.com/api-evangelist/plyrium-com/refs/heads/main/mcp/plyrium-com-mcp.yml
- **ToolCrosswalk** — https://raw.githubusercontent.com/api-evangelist/plyrium-com/refs/heads/main/mcp/plyrium-com-tool-crosswalk.yml
- **AgentCard** — https://raw.githubusercontent.com/api-evangelist/plyrium-com/refs/heads/main/a2a/plyrium-com-a2a.yml
- **AICatalog** — https://raw.githubusercontent.com/api-evangelist/plyrium-com/refs/heads/main/well-known/plyrium-com-ai-catalog.json
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/plyrium-com/refs/heads/main/overlays/plyrium-com-vouchspec-overlay.yaml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/plyrium-com/refs/heads/main/errors/plyrium-com-problem-types.yml
- **DataModel** — https://raw.githubusercontent.com/api-evangelist/plyrium-com/refs/heads/main/data-model/plyrium-com-data-model.yml
- **Sandbox** — https://raw.githubusercontent.com/api-evangelist/plyrium-com/refs/heads/main/sandbox/plyrium-com-sandbox.yml
- **GitHub** — https://github.com/mordiaky/vouchspec
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/plyrium-com/refs/heads/main/apis.yml

## Tags

Agent Skills, Supply Chain Security, Software Provenance, x402, Signed Receipts

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