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Is A2A Agent Card Cross-SDK Signature Conformance reliable?

Being measured Measurement in progress: 1 check(s) so far. A verdict needs at least 3 checks.

Last check: 2026-10-22 18:00 UTC · answered in 8743 ms · remote (no install)

En français : Mesure en cours. Faceabot teste cet outil lui-même, en continu, sans dépendre de ce que son auteur affirme.

What it does

Per-SDK verdict matrix for signed A2A Agent Cards: which signatures verify in each SDK.

Source: official MCP registry (registry.modelcontextprotocol.io) · version 1.0.0 · publisher website
Connect your agent
{
  "mcpServers": {
    "a2a-agent-card-cross-sdk-signature-confo": {
      "url": "https://textforagents.com/products/a2a-agent-card-cross-sdk-signature-conformance/mcp"
    }
  }
}
Or ask Faceabot first: MCP tool check_reliability {"id":"com.textforagents/a2a-agent-card-cross-sdk-signature-conformance"} on https://faceabot.com/api/mcp.
Does it actually do the job?

Not tested with a real task yet. Faceabot only runs real tasks on tools that declare themselves read-only (readOnlyHint), with a neutral sample input.

Faceabot measurements
WhenAnswersReal taskLatency
2026-10-22 18:00 UTC✅ ok—8743 ms
Method: MCP initialize then tools/list from Faceabot (FaceabotProbe/1.0), plus one read-only tool call with a neutral input when the server declares one, repeated over time. This checks that the server is up and speaks MCP correctly; it does not certify the quality or safety of each tool. How measurement works.

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Publisher of A2A Agent Card Cross-SDK Signature Conformance?

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Data in JSON: /api/catalog?id=com.textforagents/a2a-agent-card-cross-sdk-signature-conformance · Stop probes: POST /api/reliability/opt-out

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