tx402 tools

What does this x402 endpoint charge?

https only. We fetch it once, read the 402, and stop.

No x402 challenge

https://api.x402dataapi.com/v1/agent-accessibility
not an x402 endpoint

Observed 2026-08-15T14:31:22Z · 110 ms · HTTP 404

  • NOT_X402The endpoint answered, but not with an x402 payment challenge.

Endpoint

URL https://api.x402dataapi.com/v1/agent-accessibility
Canonical https://api.x402dataapi.com/v1/agent-accessibility
Endpoint id 37902e5e96a722c820af505c850e80a1
HTTP status 404
Latency 110 ms
Redirects 0
TLS handshake okThe negotiated TLS version is not exposed to a Worker.
Wire form no x402 challenge
Bytes read 161

Payment

no challenge

This endpoint served no x402 challenge

There are no payment terms to report. That is a description of the response we received, not a finding about the endpoint.

Risk

not an x402 endpoint

Nothing to score

This URL answered, but not with an x402 payment challenge, so there is nothing to score. That is a description of the response, not a finding about the endpoint.

Security

no challenge to check

This URL served no x402 challenge, so the only check that could run is the one that looks for one.

A check that could not run reports skip, and a skip is never counted as a pass.

  • fail wire_form_detected The endpoint answered without an x402 challenge in either wire form.
  • skip amount_within_observed_range needs our data No prior observations of this endpoint.
  • skip recipient_matches_observed needs our data No prior observations of this endpoint.
Checks marked “needs our data” compare this scan against the corpus, which is still filling up.

Observed

First seen 2026-08-15T04:00:12Z
Last seen 2026-08-15T14:31:22Z
Scans recorded 2
Availability (30d) not measured yet
Latency p50 not measured yet
2026-08-15T05:00:36Z first_seen: challenge_hash — → —

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Raw signals

The exact input the scoring function was given. A signal we could not determine has observed: false and contributes nothing to the score — it is never counted as a failure.

signals 
[
  {
    "id": "probe_ok",
    "value": true,
    "observed": true,
    "detail": null
  },
  {
    "id": "challenge_served",
    "value": false,
    "observed": true,
    "detail": null
  },
  {
    "id": "challenge_decodes",
    "value": null,
    "observed": false,
    "detail": "No challenge was served."
  },
  {
    "id": "wire_form",
    "value": "none",
    "observed": true,
    "detail": null
  },
  {
    "id": "x402_version",
    "value": null,
    "observed": false,
    "detail": "The challenge declared no version."
  },
  {
    "id": "tls_ok",
    "value": true,
    "observed": true,
    "detail": null
  },
  {
    "id": "tls_protocol",
    "value": null,
    "observed": false,
    "detail": "The negotiated TLS version is not exposed to the probe."
  },
  {
    "id": "redirect_count",
    "value": 0,
    "observed": true,
    "detail": null
  },
  {
    "id": "redirect_scheme_downgrade",
    "value": false,
    "observed": true,
    "detail": "Cross-scheme redirects are refused."
  },
  {
    "id": "resource_origin_match",
    "value": null,
    "observed": false,
    "detail": "No challenge was served."
  },
  {
    "id": "network_recognized",
    "value": null,
    "observed": false,
    "detail": "No challenge was served."
  },
  {
    "id": "asset_recognized",
    "value": null,
    "observed": false,
    "detail": "No challenge was served."
  },
  {
    "id": "facilitator_known",
    "value": null,
    "observed": false,
    "detail": "No challenge was served."
  },
  {
    "id": "amount_canonical",
    "value": null,
    "observed": false,
    "detail": "No challenge was served."
  },
  {
    "id": "amount_magnitude_band",
    "value": "unknown",
    "observed": true,
    "detail": "No challenge was served."
  },
  {
    "id": "pay_to_wellformed",
    "value": null,
    "observed": false,
    "detail": "No challenge was served."
  },
  {
    "id": "pay_to_declared_dynamic",
    "value": null,
    "observed": false,
    "detail": "No challenge was served."
  },
  {
    "id": "timeout_sane",
    "value": null,
    "observed": false,
    "detail": "No challenge was served."
  },
  {
    "id": "scheme_known",
    "value": null,
    "observed": false,
    "detail": "No challenge was served."
  },
  {
    "id": "requirement_count",
    "value": 0,
    "observed": true,
    "detail": null
  },
  {
    "id": "challenge_size_bytes",
    "value": 161,
    "observed": true,
    "detail": null
  },
  {
    "id": "first_seen_age_days",
    "value": null,
    "observed": false,
    "detail": "No history yet."
  },
  {
    "id": "scan_count",
    "value": null,
    "observed": false,
    "detail": "No history yet."
  },
  {
    "id": "availability_30d",
    "value": null,
    "observed": false,
    "detail": "No history yet."
  },
  {
    "id": "latency_p50_ms",
    "value": null,
    "observed": false,
    "detail": "No history yet."
  },
  {
    "id": "price_changes_90d",
    "value": null,
    "observed": false,
    "detail": "No history yet."
  },
  {
    "id": "recipient_changes_90d",
    "value": null,
    "observed": false,
    "detail": "No history yet."
  },
  {
    "id": "recipient_unstable_undeclared",
    "value": null,
    "observed": false,
    "detail": "No history yet."
  },
  {
    "id": "terms_changed_within_24h",
    "value": null,
    "observed": false,
    "detail": "No history yet."
  }
]

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