A2A · AGENT-TO-AGENT · MACHINE PAYMENTS

A2A agents should be able to discover and buy tools themselves.

HumanMirror combines an A2A discovery agent, Solve-first routing, Nexus metering and x402 V2. An A2A agent can find a capability, inspect observed reputation metrics and use a paid resource without first opening a conventional SaaS account.

Inspect A2A Agent Card Inspect observed metrics

The A2A path

1 · Discover

Read the HumanMirror A2A Agent Card or call Solve with the result the agent needs.

2 · Decide

Inspect cost, proof semantics and observed runtime metrics before execution.

3 · Pay and execute

Use Nexus credits or an x402 resource. The x402 production flow verifies authorization before execution and settles only after the HumanMirror result verifies.

Machine-readable surfaces

A2A: https://humanmirror.fr/.well-known/agent-card.json
Solve: https://humanmirror.fr/api/solve/
x402: https://humanmirror.fr/.well-known/x402.json
Reputation: https://humanmirror.fr/api/reputation/
Nexus MCP: https://humanmirror.fr/api/nexus/mcp/

Current x402 resources use live Base mainnet USDC settlement to the configured HumanMirror payTo address. The HTTP 402 challenge and PAYMENT-RESPONSE returned by the live endpoint remain the source of truth for each paid call.