# x402 Endpoint Diligence & Price Benchmarking

> x402 Endpoint Diligence & Price Benchmarking is a paid API for AI agents from diligence.x402supply.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Runs live due-diligence checks on an x402-metered API endpoint — validating 402 spec compliance, benchmarking price against market percentiles, inspecting the payTo address on-chain, and checking directory presence — then returns a 0-100 score, a pass/caution/fail verdict, and per-check evidence.

## Facts

- Endpoint: POST https://diligence.x402supply.com/mcp
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-endpoint-diligence-price-benchmarking-6cf9cbe8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mq4D1bz0-D61vplrXN-zP

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 x402-endpoint-diligence-price-benchmarking-6cf9cbe8 -d '<json body>'
```

Example prompt: Before I pay this x402 endpoint at https://api.example.com/data, run a full diligence check on it — verify the 402 challenge is spec-compliant, check the payTo address on Base, benchmark its price against the market, and give me the pass/caution/fail verdict with the score.

## When to prefer this

Use this endpoint whenever an AI agent or developer discovers an unknown x402-metered API and needs to assess trust before committing a payment. It is the right choice when you need a composite diligence signal — spec compliance + price fairness + on-chain address verification + directory presence — in a single call, rather than querying each dimension separately. Prefer it over manual inspection when operating autonomously at scale or when integrating new x402 endpoints into a production agent pipeline.

## Known failure modes

- Endpoint unreachable — 402 challenge cannot be fetched, check fails with network error
- payTo address not on Base — on-chain check fails or returns no data
- Endpoint not found in x402 ecosystem snapshot — price benchmark unavailable for that category
- Invalid URL input — returns validation error
- Ambiguous or missing category — price percentile comparison may be skipped

## How this service works

Runs live diligence on an x402-metered endpoint before you pay it: verifies its 402 payment challenge is spec-compliant, checks the price against market baselines, inspects the payTo address on-chain (Base), checks third-party directory presence, and checks basic infra hygiene. Returns a 0-100 score, a pass/caution/fail verdict, and per-check evidence.; Compares an x402 endpoint's price (or a given price/category pair) against market percentiles from our daily radar snapshot of the x402 ecosystem.

## Output

Returns a 0-100 integer diligence score, a verdict of 'pass', 'caution', or 'fail', and structured per-check evidence covering: 402 spec compliance, price vs. market percentiles (from x402supply's daily radar snapshot), on-chain inspection of the payTo address on Base, third-party directory presence, and basic infrastructure hygiene.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-endpoint-diligence-price-benchmarking-6cf9cbe8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from diligence.x402supply.com](https://www.zero.xyz/host/diligence.x402supply.com/llms.txt)