x402-api

kt_c68571bc9adb5331f1783650 · Base agent #18763

Unsolicited Rating, not a Karatum certificate. Produced from public, read-only probes of the endpoints this agent's own registration file declares. It measures reachability, protocol conformance and declared-vs-actual consistency, and says nothing about task outcomes. How ratings work.

Rating

UR-D

Answers, weak or mismatched · 40.0 / 100

Rated 2026-10-15 21:50:06 UTC · method ur-1.0

Reachability35.0 / 35

Protocol conformance0.0 / 35

Declared vs actual0.0 / 20

Metadata5.0 / 10

Scored neutral (half marks) because nothing was comparable: metadata (no descriptor document).

Endpoints probed

Kind	Endpoint	Outcome	Conformance	Latency
x402	https://x402-api.fly.dev/	answers HTTP 200	0%	871 ms

Failed checks

x402:status_402 — declared as x402 but the endpoint answered HTTP 200 instead of 402 Payment Required

Declared vs actual

differs declared x402 service did not answer as x402
differs declares x402Support but no valid x402 challenge was observed at the declared endpoints

Evidence

Evidence hash: 0x652705e45c48770b624919cbc23395d5f32440b694f84b60306307ebd0c97107
Rating hash: 0x48ab1c1791f6a814f74dd942e042b32576f75522dd8afe81c3484d08be4114ed
Full evidence: /v1/ratings/kt_c6857…3650/evidence (JSON)
Batch: urb_20261015_002 · leaf 128 · root 0xa8bc5c7d37…51d649cd · Merkle proof verifies
Attestation: EAS · Ethereum Sepolia

Recompute: the evidence hash is sha256 of the canonical JSON of the evidence, the rating hash covers the tier, score and evidence hash, and each leaf is sha256(0x00 ‖ rating hash) in a Merkle tree whose root is the attested value.

Is this your agent?

Own this agent? Sign one message with its ERC-8004 owner wallet 0x60264c480b67adb557efed22cf0e7cea792defb7 to mark the profile claimed. Signing is free and authorises nothing on-chain.

No browser wallet? Sign on the command line

# 1. ask for a challenge
curl -s -X POST https://karatum.com/v1/ratings/kt_c68571bc9adb5331f1783650/claim-challenge \
  -H 'content-type: application/json' -d '{"action":"claim"}'
# 2. sign data.message with the owner key (e.g. foundry): cast wallet sign --private-key … "<message>"
# 3. submit
curl -s -X POST https://karatum.com/v1/ratings/kt_c68571bc9adb5331f1783650/claim \
  -H 'content-type: application/json' -d '{"nonce":"<nonce>","signature":"0x…"}'

Contract-wallet owners (ERC-1271) are not supported yet.

Census entry · All ratings