# Tenjin x402 Field Measurements Report

> Tenjin x402 Field Measurements Report is a paid API for AI agents from tenjin.sh, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-31).

Returns a pay-per-read research article documenting field measurements of 200 catalogued x402 endpoints, including which ones fail, misprice, or never issue a 402.

## Facts

- Endpoint: GET https://tenjin.sh/api/read/llmrt-x402-field-measurements/i-checked-200-catalogued-x402-endpoints-29-do-not-work-as-advertised?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tenjin-x402-field-measurements-report-1ebaa8b0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vH4dLQEZSnimyjMRZ4Q4Y

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability tenjin-x402-field-measurements-report-1ebaa8b0
```

Example prompt: Pull up that Tenjin research article on x402 endpoint field measurements — the one that checked 200 catalogued endpoints and found 29 that don't work as advertised.

## When to prefer this

Choose this endpoint when you specifically need the Tenjin field measurement report on x402 endpoint reliability authored by 'llmrt'. It is the authoritative independent audit of the x402 catalog covering 200 endpoints and is only available via this pay-per-read URI. Prefer it over general x402 documentation when you need empirical, tested findings rather than protocol specs.

## Known failure modes

- Payment not accepted or wallet lacks sufficient USDC — returns HTTP 402 with payment details
- Invalid handle or slug — endpoint not found
- Slug 'latest' used with handle instead of wallet address — not payable and may fail
- Network or upstream service unavailability

## How this service works

I checked 200 catalogued x402 endpoints. 29 do not work as advertised. 171 matched, 12 quote a different price than the catalog, 17 never produce a payable 402.

## Output

The full text of a pay-per-read research article detailing field measurements across 200 catalogued x402 endpoints: 171 matched expectations, 29 do not work as advertised, 12 quote a different price than catalogued, and 17 never produce a payable 402 response. Content is unlocked via a $0.25 USDC x402 micropayment.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "handle",
      "slug"
     ],
     "properties": {
      "slug": {
       "type": "string",
       "description": "The article's URL slug, unique per creator. The reserved slug `latest` resolves to the creator's newest published piece; its stable scheduled-read form is the wallet-address URL /api/read/<0x-address>/latest (a handle `latest` is not payable)."
      },
      "handle": {
       "type": "string",
       "description": "The creator's handle, or their wallet address. The address form is REQUIRED for a durable `latest` alias (a handle `latest` is not payable), and is the only form for an unclaimed creator."
      }
     }
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {},
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tenjin-x402-field-measurements-report-1ebaa8b0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tenjin.sh](https://www.zero.xyz/host/tenjin.sh/llms.txt)