csoai/a2a-census

A2A agent census

DISCOVERED — read-only census of A2A (Agent2Agent) agent cards. Keyless crawl of /.well-known/agent-card.json + A2A v1.0 conformance + ONE controlled deterministic capability probe per agent. No real task was ever sent to a stranger agent; nothing published. The live board is GET https://councilof.ai/api/gspc.

Defensible seed list: the agent domains discovered genuinely on-chain-live in the ERC-8004 live-filter (their declared service endpoints), plus a curated set of well-known A2A domains. We fetched /.well-known/agent-card.json (legacy agent.json fallback), checked it against the A2A v1.0 AgentCard shape (frozen Mar 2026), and ran one probe.

Result (a2a_census.json)

• 18 seeds crawled. Only 5 serve a conformant AgentCard; 13 serve no card (many return an HTML lander at the well-known path). Most on-chain-"live" agents do not publish a conformant A2A card.
• Capability-honesty axis — ONE deterministic probe I control: a JSON-RPC tasks/get with a random nonexistent id (read-only; asks the agent to do no real work, triggers no payment). Graded declared-vs-actual transport:
  • TRANSPORT_HONEST — declares A2A JSON-RPC and answered with a well-formed JSON-RPC envelope (e.g. A-Identity Trust Oracle, Brain On BNB).
  • TRANSPORT_MISMATCH — declares an A2A card but the transport did not answer JSON-RPC correctly (a real declared-vs-actual gap).

Reported context (cited, not endorsed, not A2A-specific)

Carnegie Mellon TheAgentCompany benchmark (arXiv:2412.14161, May 2025) reported the worst model (Llama-3.1-405b) failed 92.6% of real-world office tasks; the best (Gemini 2.5 Pro) still failed 70%. This is a general agent-task-completion benchmark, not an A2A-protocol measurement — cited to motivate measuring declared-vs-actual capability. https://arxiv.org/abs/2412.14161

Files

• a2a_census.jsonl — flat viewer table, one row per crawled seed (18): agent_name, domain, seed, card_state (CONFORMANT/NO_CARD), capability_honesty_verdict, skill_count, as_of. Field-presence lists live in a2a_census.json, not this table.
• a2a_census.json — per-seed card URL, conformance, field presence, honesty probe verdict.
• a2a_atoms.json — the unique conformant agents with their honesty verdict.
• ledger-card-a2a-agent-unsigned.json — the a2a.agent card-v0 atom (sig_ed25519=null — NO_LAPTOP_SIGN, queued for GHA OIDC signing).

What this is not

• No real A2A task was sent — only one controlled protocol-level probe per agent.
• Skill execution correctness is unmeasured[]. Streaming/push actuals unmeasured.
• Not a GSPC axis. No GSPC measure fields on any card.

Measurement, not certification. Verify a card (free, no account): https://councilof.ai/gspc-verify

The live board is the authority

GET https://councilof.ai/api/gspc — quote totals.public_count. This Hub card is a printer of that GET, never a second engine. If the fetch fails the honest answer is UNCHECKABLE — never a fabricated 0.000. Status words: LOADING / UNREACHABLE / UNMEASURED / UNCHECKABLE.

Lid: 22 axes measured · 14 model fleets · 3 public leader scores · 8 fact runs · TIE is TIE · not a certificate.

Capability + living GET (TUI7 distribution 2026-09-14)

SUPERSEDED: typed Hub triples LIVE (re-GET /api/hub-cards → counts.*) (and prior 885/900/937/1113/1182/1185) — do not re-paste. Hub cite = live GET only.

Live board: GET https://councilof.ai/api/gspc → quote totals.public_count / totals.lid (22·22·0 derived, never typed as a frozen paste)
Hub cards: GET https://councilof.ai/api/hub-cards → quote counts.cells / counts.measured / counts.unmeasured LIVE (no typed Hub triple)
Hub bank: https://huggingface.co/datasets/csoai/gspc-hub-cards
Free verify: https://councilof.ai/gspc-verify
Discovery: GET https://councilof.ai/.well-known/x402.json (live · Base · USDC)
OX discovery resources: councilof 0/60 honest — do not invent rows
Measurement, never certification. Printer only — no axis mine on ZeroGPU. A100 COLD.

Council of AI — GSPC + Hub printer

• Living board: https://councilof.ai/api/gspc — quote totals.public_count / totals.lid (never invent MEASURED)
• Hub cite: https://councilof.ai/api/hub-cards — re-GET; quote counts.* (typed LIVE (re-GET /api/hub-cards → counts.*) SUPERSEDED 2026-09-14)
• Hub dataset bank: https://huggingface.co/datasets/csoai/gspc-hub-cards
• Verify free: https://councilof.ai/gspc-verify
• x402 discovery: https://councilof.ai/.well-known/x402.json
• Catalog: https://councilof.ai/api/x402
• Free door (amount 0): https://councilof.ai/api/free-door
• Jail goldbank: https://huggingface.co/datasets/csoai/gspc-jail-goldbank
• Human: free + x402 PAYG · Coming—Paddle not live · never Stripe
• Agents: payTo is merchant receive — never the signer
• Self-settle proves the rail; stranger revenue is separate (do not invent buyers)
• Measurement, not certification. Never sell a rank. Never certify.

Any Hub x402.json in a CSOAI printer is a byte-mirror of the living well-known GET — not a second authority.

OpenAPI / CDP discovery (apex · Wave E)

OpenAPI (canonical): GET https://councilof.ai/openapi.json  → version 0.2+6c709613dc31 · 97 paths
NOT: https://councilof.ai/public/openapi.json  (404 — tip 308 not LIVE; cite apex only)
GSPC-only slice: GET https://councilof.ai/api/openapi.json  (7 paths — not CDP paid catalog)
x402 discovery: GET https://councilof.ai/.well-known/x402.json  (mode live · Base eip155:8453 · USDC)
Catalog: GET https://councilof.ai/api/x402
Living board: GET https://councilof.ai/api/gspc → 22 axis · 22 measured (22·22·0)
Verify free: https://councilof.ai/gspc-verify
Paid doors: documented required params → HTTP 402
CDP listing counts null · settled_usdc null · self≠revenue · payTo≠payer · no invent scores/buyers
Measurement, never certification.

This repository: NOT A BOARD MEASUREMENT — this repository is a corpus, mirror or door published by CSOAI. It carries no axis score. The measured slots live on the board GET below.

Live board (authority)	https://councilof.ai/api/gspc
Verify a card — free, no account	https://councilof.ai/gspc-verify
How to verify, by hand	https://councilof.ai/signed/HOW-TO-VERIFY.md
Transparency root (Merkle)	https://councilof.ai/root.json
Every CSOAI repo on the Hub	https://huggingface.co/csoai
Methodology DOI	10.5281/zenodo.21991104 (Zenodo record unavailable since 29 Sep 2026: account blocked by Zenodo; appeal pending. Live methodology page (not the deposit's bytes): https://councilof.ai/methodology/)
MCP endpoint — 12 tools, verified 2026-09-04T04:33:29Z	POST https://councilof.ai/mcp
MCP Registry	io.github.CSOAI-ORG/gspc — version not pinned here; the registry is the authority
npm — MCP server	csoai-gspc-mcp — npx -y csoai-gspc-mcp. No version is pinned here: ask the registry for the current one rather than trusting a number written on a card.
Python reader + card verifier	pip install "csoai-gspc[verify]" then csoai-gspc check — re-derives the board totals from the axis array and exits non-zero if they disagree
This board as a dated, citable snapshot	10.5281/zenodo.22293341 (Zenodo record unavailable since 29 Sep 2026: account blocked by Zenodo; appeal pending. Live board dataset (not the deposit's bytes): https://huggingface.co/datasets/csoai/gspc-board)

What is in this repository

file	bytes	rows	what
a2a_census.json	7658		JSON document
README.md	4217		card
a2a_census.jsonl	4034	18	data (one JSON object per line)
ledger-card-a2a-agent-unsigned.json	2218		JSON document
a2a_atoms.json	2116		JSON document
manifest.jsonl		6	derived at 2026-09-04T04:33:29Z

manifest.jsonl is derived from this repository's own file tree at 2026-09-04T04:33:29Z; it lists every file with its size, its blob hash and a direct URL, so an agent can enumerate the repo without cloning it.

Citation

@misc{csoai_gspc_a2a_census,
  title        = {A2A agent census},
  author       = {{CSOAI Ltd}},
  year         = {2026},
  doi          = {10.5281/zenodo.21991104},
  howpublished = {Hugging Face Hub, \url{https://huggingface.co/datasets/csoai/a2a-census}},
  note         = {Live board: https://councilof.ai/api/gspc. Measurement, not certification.}
}

---

Measurement, not certification. No slot is for sale and no empty slot is filled by payment. Issued by CSOAI Ltd (England & Wales, Companies House 16939677), 3rd Floor, 86–90 Paul Street, London EC2A 4NE. Card refreshed 2026-09-04T04:33:29Z; every number above is either fetched live or carries the timestamp at which it was read.

Signed measurement archive (free cite · never a grade)

Living board: GET https://councilof.ai/api/gspc → 22 axis · 22 measured · lid: 22 axes measured · 14 model fleets · 3 public leader scores · 8 fact runs · TIE is TIE · not a certificate.
Signed card index: GET https://councilof.ai/signed/card_index.json → n_cards=335 · schema csoai.gspc-card-index/0.1
How to verify (stranger): https://councilof.ai/signed/HOW-TO-VERIFY.md
Free verify UI: https://councilof.ai/gspc-verify/
Example SIGNED card: https://councilof.ai/signed/cards/cff1aaf070acb97c224177809856bc20310f4958eb44bdffab7d4b04836535f4.json
Hub census (≠ board ≠ card_index): GET https://councilof.ai/api/hub-cards → 131/131/0
HF printers: https://huggingface.co/datasets/csoai/gspc-hub-cards · https://huggingface.co/datasets/csoai/gspc-jail-goldbank
Supply-led: CSOAI measures public systems independently first; sells delivery/freshness/monitoring/integration/replay/extra compute — never grades or favourable results.
Measurement credential, never certification. Free refresh only.

Owner: N-Sites — free paste onto HF/Kaggle printers. Hub LIVE 131 (kill 1191/1196). card_index n=335. Never invent VC/revenue. Stamp 2026-09-14T10:37Z.

Objections, contact and corrections

To object to a row, ask for a re-check, request a correction or ask for a record to be withdrawn, email nicholas@csoai.org or use the appeals and dispute route at https://councilof.ai/dispute/. Corrections are listed in the corrections ledger at https://councilof.ai/api/corrections, with what changed and when. CSOAI Ltd (company no. 16939677, England and Wales) is the accountable publisher.

How to cite

CSOAI Ltd (Council of AI). A2A agent census. 2026. Hugging Face dataset csoai/a2a-census. https://huggingface.co/datasets/csoai/a2a-census

@misc{csoai_a2a_census,
  title        = {A2A agent census},
  author       = {{CSOAI Ltd}},
  year         = {2026},
  howpublished = {Hugging Face dataset, https://huggingface.co/datasets/csoai/a2a-census},
  note         = {Corrections: https://councilof.ai/api/corrections}
}

Licence: CC-BY-4.0. Attribute Council of AI, CSOAI Ltd (16939677), https://councilof.ai.

Corrections and verification

• Corrections ledger (signed): https://councilof.ai/api/corrections. Corrections to CSOAI's published records are logged there with what changed and when.
• Verify a signed record yourself, free and without an account: https://councilof.ai/gspc-verify/ (step by step: https://councilof.ai/signed/HOW-TO-VERIFY.md).
• Conformance kit for signed-receipts/v1, with test vectors for implementers: https://councilof.ai/spec/signed-receipts/v1/conformance/