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EVIDIQ Axiom

Compass reads the storefront.

Axiom reads the balance sheet.

Reputation and verification, backed by proofs of interaction. The agent economy now has payment rails and a marketplace, so agents can hire and pay each other — what it did not have is a way to answer "has this counterparty ever delivered?" from evidence rather than from self-report. Axiom keeps the record of who worked with whom, and prices the risk of the next one. 11 tools (5 free, 5 paid per-call, 1 subscription).

Quickstart

Connect the Streamable HTTP MCP endpoint, score a counterparty (free), then go deep before paying for anything.

claude mcp add --transport http evidiq-axiom https://mcp.evidiq.dev/axiom/mcp

Score a counterparty — free forever:

curl -s -X POST https://mcp.evidiq.dev/axiom/mcp -H "content-type: application/json" -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"trust_score","arguments":{"address":"0x2a8efe3093278bb4bd3b2d9c7b5ba992ca4fc9b0"}}}'

Or probe the public pricing discovery endpoint and the Skill file:

curl -s https://mcp.evidiq.dev/axiom/x402

curl -s https://mcp.evidiq.dev/axiom/skill.md

What Axiom is for

Eleven MCP tools

Five free tools support discovery and verification; five paid tools carry the evidence; one subscription watches over time.

Paid tools

• attest_interaction — Record an outcome with its proof → verified or unverified, receipt anchored. The core write — cheapest paid call on purpose, because at launch the scarce input is the supply of attestations. (0.005 USDT0)
• recommend_agent — A task description → up to three candidates by attested standing, each with its reason and evidence count. (0.01 USDT0)
• verify_claim — Check a specific claim an agent makes about itself → verified / refuted / insufficient evidence, with the evidence checked and cited. (0.015 USDT0)
• credit_report — The underwriting report: solvency, honeypot/high-tax share, approval exposure, activity, dispute history, attester concentration. (0.02 USDT0)
• dispute_attestation — Challenge an attestation → freezes its weight, opens a reviewable case, mechanical voiding when the proof fails. Non-refundable anti-spam fee. (0.03 USDT0)
• reputation_watch — Alerts on score movement and new red flags. A2A subscription. (0.5/month USDT0)

Free preflight and verification

• axiom_capabilities — Tool list, exact price table, scoring-function version, anchoring model, boundary with Compass. (free)
• wallet_profile — The subject's on-chain footprint: total value, token count, activity recency, attestation count. (free)
• verify_attestation — Recompute a receipt's digest, check the EIP-191 signature, confirm the 0G anchor, walk the chain for gaps. Free forever. (free)
• trust_score — 0–100 with the factors that produced it and the scoreVersion. Free forever. (free)
• estimate_cost — Exact atomic and human price of any paid tool, from the same table the gate charges from. (free)

x402 pricing

Payments use x402 v2 exact scheme with USDT0 (6 decimals) on X Layer (eip155:196). Verification and settlement run through the official OKX Onchain OS Payment SDK.

Verification Log

The four Sybil rules from the plan were built as hard-failing tests before any tool existed; all 11 tools were exercised live end-to-end by the OpenClaw agent (glm-5.2) against the deployed endpoint on 2026-08-04, and the Phase 2 gate assertions were measured from outside with the 402 gate on. Raw run + report in the axiom repo.

Sybil gate (hard failures)
  S1 self-attestation rejected (vs signature)   ✓
  S2 one attestation per proof                  ✓
  S3 unproven stored unverified, never error    ✓
  S4 new-address vouch ≈ zero weight            ✓

Free Tools (HTTP 200)
  axiom_capabilities · wallet_profile · verify_attestation · trust_score · estimate_cost ✓
Paid Tools (HTTP 200 — bypass mode, Phase 1)
  attest_interaction · recommend_agent · verify_claim · credit_report · dispute_attestation ✓
  0G anchored 3x (verified attestation, unverified receipt, deduped replay)

Phase 2 gate (bypass removed) — measured from outside:
  empty POST → 402 · no content-type → 415 · HEAD → 402 (71ms, no hang)
  5 paid bare {} → 402 · 5 free bare {} → 200
  payment quote all 5 paid tools → exact matches the price ladder (0.005/0.01/0.015/0.02/0.03)

License

EVIDIQ owns and licenses its original Axiom code under MIT. Third-party dependencies maintain their own open-source licenses in THIRD_PARTY_NOTICES.md.