inspect

Lint any x402 endpoint or payment header against the v2 spec and real CDP facilitator behavior: CAIP-2 network ids, atomic amounts, the EIP-712 domain-name trap ('USD Coin' on…

Lint any x402 endpoint or payment header against the v2 spec and real CDP facilitator behavior: CAIP-2 network ids, atomic amounts, the EIP-712 domain-name trap ('USD Coin' on Base mainnet vs 'USDC' on Sepolia — wrong name = every settlement fails), the extensions echo Coinbase Bazaar requires for indexing, expired authorizations. Findings as error/warning/info with what will actually break. Built by a seller that debugged all of these in production.

UNRATEDListed

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.001 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0x4395c7e3…923dd965

URL

https://agentbit.app/v1/x402/inspect

MCP server on this host: app.agentbit/mcp

Seen

first 28 days ago · last 12 hr ago

51 free handshakes

Payment

Pays through

x402

Offered on?

Polygon, Arbitrum, eip155:480, Base USDC, Solana

Listed on?

Polygon, Arbitrum, Base, Solana

Score, from free handshakes onlyweights 2026.09.6

UN
RATED

0.726 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held down by latency p95 · gap to 1.000 is 0.274: 0.074 uncertain ? + 0.200 short ? · 0.074 to B

How the composite of 0.726 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
latency p95costs the most it answered as fast as its class	0.20	0.00	0.000		0.000	−0.200	0
liveness it answered at all	0.60	1.00	0.877		0.526	0	−0.074
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.726	gap to 1.000 = 0.274 · 0.200 short · 0.074 uncertain	0.726	−0.200	−0.074

Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check

The multiplication, written out

  0.200 × 0.000   latency p95    
+ 0.600 × 0.877   liveness       
+ 0.200 × 1.000   price stability
= 0.726           → UNRATED: 50 of 30 paid calls      weights 2026.09.6 · 50 samples · seed cap_01M1VG61HHMEWMB94PCZESDF7W|2026-09-03T12:16:43.657Z|2026.09.6

Verify it yourselfnpx teppi-check https://agentbit.app/v1/x402/inspectcurl -s https://api.teppi.xyz/v1/trust/cap_01M1VG61HHMEWMB94PCZESDF7W