# Merchant-0 A2A Agent

**Canonical:** https://apis.io/apis/merchant-0-com/merchant-0-a2a-agent/  
**Provider:** Merchant-0 — https://apis.io/providers/merchant-0-com/  
**Base URL:** https://api.merchant-0.com  
**Documentation:** https://merchant-0.com/

Merchant-0 A2A Agent is one of 2 APIs that [Merchant-0](https://apis.io/providers/merchant-0-com/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include A2A, Agent-Native, and Decentralized Identity.

Agent2Agent (A2A) surface: an agent card served from https://merchant-0.com/.well-known/agent-card.json (with a pre-0.3 agent.json at the legacy path) naming did:web:merchant-0.com, four skills (SEA intelligence query, SEA market report, agent DID verification, subscription-status proof) and https://api.merchant-0.com as the agent URL. The card is graded flavored against A2A 1.0.0: it carries no protocolVersion (a protocolVersions array instead), its capabilities object is a keyed map of priced SKUs rather than the A2A capabilities shape, and the JSON-RPC responder lives at POST /message/send (the card's own url answers 405) and returns one fixed acknowledgement payload for every method. Real purchases run over the REST AP2 endpoints, which the card lists under a non-standard endpoints block.

## Machine-readable artifacts (2)

- **AgentCard** — https://raw.githubusercontent.com/api-evangelist/merchant-0-com/refs/heads/main/a2a/merchant-0-com-a2a.yml
- **AgentCard** — https://merchant-0.com/.well-known/agent-card.json

## Other Merchant-0 APIs (1)

- [Merchant-0 A2A Protocol Server API](https://apis.io/apis/merchant-0-com/merchant-0-a2a-protocol-server-api/)

## Tags

A2A, Agent-Native, Decentralized Identity

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/merchant-0-com/merchant-0-a2a-agent/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/merchant-0-com/.