payment

x402 Doctor: why a payment failed, in plain words: the cause, whose side it is on (your client, your wallet, the network, the seller or the facilitator) and how to fix it, from…

x402 Doctor: why a payment failed, in plain words: the cause, whose side it is on (your client, your wallet, the network, the seller or the facilitator) and how to fix it, from over 40 named causes (x402 and Coinbase facilitator codes, EVM and Solana, HTTP and network errors). Send the seller 402 as challenge and the error as response, by POST JSON or GET query. Unknown failures are reviewed nightly.

UNRATEDListed

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.005 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0x5976376b…43fb6d93

URL

https://api.maxwellinternational.ai/v1/doctor/payment

MCP server on this host: ai.maxwellinternational/data

Seen

first 4 days ago · last 17 hr ago

7 free handshakes

Payment

Pays through

x402

Offered on?

Base USDC, Solana

Listed on?

Base, Solana

Score, from free handshakes onlyweights 2026.09.6

UN
RATED

0.274 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held back by sample size, not by the seller · gap to 1.000 is 0.726: 0.526 uncertain ? + 0.200 short ? · 0.176 to D

How the composite of 0.274 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
livenesscosts the most it answered at all	0.60	1.00	0.123		0.074	0	−0.526
latency p95 it answered as fast as its class	0.20	0.00	0.000		0.000	−0.200	0
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.274	gap to 1.000 = 0.726 · 0.200 short · 0.526 uncertain	0.274	−0.200	−0.526

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

The multiplication, written out

  0.600 × 0.123   liveness       
+ 0.200 × 0.000   latency p95    
+ 0.200 × 1.000   price stability
= 0.274           → UNRATED: 7 of 30 paid calls      weights 2026.09.6 · 7 samples · seed cap_01M3RDHFV23XACDZV0E4PS930Y|2026-09-04T15:34:08.493Z|2026.09.6

Verify it yourselfnpx teppi-check https://api.maxwellinternational.ai/v1/doctor/paymentcurl -s https://api.teppi.xyz/v1/trust/cap_01M3RDHFV23XACDZV0E4PS930Y