# DEUSPROOF A2A Agent

**Canonical:** https://apis.io/apis/deusproof-com/deusproof-a2a-agent/  
**Provider:** DEUSPROOF — https://apis.io/providers/deusproof-com/  
**Base URL:** https://deusproof.com/a2a/jsonrpc  
**Documentation:** https://deusproof.com/skill.md

DEUSPROOF A2A Agent is one of 3 APIs that [DEUSPROOF](https://apis.io/providers/deusproof-com/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include A2A, Agent-Native, and Provenance.

Agent2Agent surface: a signed (JWS EdDSA, kid = the register's did:key) A2A 1.0 agent card at https://deusproof.com/.well-known/agent-card.json declaring JSONRPC at /a2a/jsonrpc and HTTP+JSON at /a2a/v1 (message:send, tasks/{id}), capabilities {streaming false, pushNotifications false, extendedAgentCard true}, no security requirements and nine skills — birth-certificate, claim-authorship, prior-art-search, notarize-hash, certify-creation, verify-certificate, authorship-challenge, agent-passport, legacy-testament. A second, 0.3-compatible card is served at the legacy /.well-known/agent.json. Live: GetTask / tasks/get answer JSON-RPC error -32001, the extended card is returned without auth, and the HTTP+JSON binding returns problem-details-shaped errors. Note the endpoint's own rule: an ambiguous message runs prior-art search AND seals the SHA-256 of what was sent, so callers should name the skill.

## Machine-readable artifacts (3)

- **AgentCard** — https://raw.githubusercontent.com/api-evangelist/deusproof-com/refs/heads/main/a2a/deusproof-com-a2a.yml
- **AgentCard** — https://deusproof.com/.well-known/agent-card.json
- **AgentCard** — https://deusproof.com/.well-known/agent.json

## Other DEUSPROOF APIs (2)

- [DEUSPROOF Notary API](https://apis.io/apis/deusproof-com/deusproof-notary-api/)
- [DEUSPROOF MCP Server](https://apis.io/apis/deusproof-com/deusproof-mcp-server/)

## Tags

A2A, Agent-Native, Provenance

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/deusproof-com/deusproof-a2a-agent/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/deusproof-com/.