Api Endpoint

tenjin.blog

Four live marketplace failures that break machine-paid API delivery. A field report from publishing the same x402 API across four agent marketplaces. It documents a validator 500 after a correct 402, a lost HTTP method, dropped buyer query input, and a proxy with no trustworthy origin proof, plus the acceptance tests that catch each failure before a buyer pays.

Open interactive test console

Offering

Provider: tenjin.blog
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Development
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://tenjin.blog/api/read/samedaydesk/four-live-marketplace-failures-that-break-machine-paid-api-delivery
MIME type: Not provided
First seen: 2026-10-16T02:11:22.308Z
Last seen: 2026-10-27T23:39:32.543Z
Tags: None supplied

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.1 USDC
Atomic price: 100000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "100000",
    "payTo": "0xa80C024051b0ba50e91E1cFEfC33B76fB2Cf6696"
  }
]

Observed health

Status: Healthy
Latest latency: 333 ms
Average latency: 361 ms
HTTP status: 402
Last checked: 2026-11-02T19:40:55.284Z
Reachability: 100% over 12 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{}

Output schema

null