What does this x402 endpoint charge?

A band describes how much of what we check we were able to confirm. It is not a judgement about the operator of an endpoint.

• Result: pass 25 The challenge decodes under the strict x402 decoder tx402 uses before paying. challenge_decodes
• Result: pass 15 The challenge describes the endpoint that served it. resource_origin_match
• Result: pass 12 The amount is a canonical atomic integer. amount_canonical
• Result: pass 12 The recipient is a well-formed address for the declared network. pay_to_wellformed
• Result: pass 8 The network is in the tx402 signed release manifest. network_recognized
• Result: pass 8 The asset is in the tx402 signed release manifest for this network. asset_recognized
• Result: skip — The challenge named no facilitator. facilitator_known
• Result: pass 6 The payment scheme is one tx402 can route. scheme_known
• Result: pass 5 The endpoint was reached over a valid TLS connection. tls_ok
• Result: warn 4 The authorization window is outside the maximum tx402 will sign for. timeout_sane
• Result: pass 3 No redirect downgraded the connection. redirect_scheme_downgrade
• Result: pass 3 The endpoint serves the x402 v2 header form. wire_form
• Result: pass 2 The amount is within the range we see for x402 endpoints. amount_magnitude_band

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

• Result: pass wire_form_detected Served as v2-header.
• Result: pass base64_strict The strict decoder accepted the header's base64 framing.
• Result: pass json_wellformed
• Result: pass x402_version_known Declared x402Version 2.
• Result: pass accepts_present The challenge offers one way to pay.
• Result: pass size_within_limit Read 345 bytes, within the probe's cap.
• Result: pass network_caip2_wellformed network: eip155:8453
• Result: pass network_recognized Recognized means present in the tx402 signed release manifest.
• Result: pass asset_recognized Recognized means present in the tx402 signed release manifest.
• Result: pass amount_atomic_canonical
• Result: pass amount_positive
• Result: pass pay_to_wellformed
• Result: warn max_timeout_sane Authorization window 300s exceeds the tx402 maximum of 60s.
• Result: pass resource_origin_match
• Result: pass scheme_known
• Result: skip facilitator_known The challenge named no facilitator.
• Result: pass mime_type_wellformed mimeType: application/json
• Result: pass extra_wellformed `extra` carries 2 field(s), preserved verbatim.
• Result: skip amount_within_observed_range needs our data No prior observations of this endpoint.
• Result: skip recipient_matches_observed needs our data No prior observations of this endpoint.

Pre-filled with this endpoint's real terms. Your signer stays in your process — this service never sees a key, never asks for one, and cannot build a payment.

npx tx402 call "https://blockrun.ai/api/v1/pm/kalshi/markets" \
  --max-spend "0.008500 USDC" \
  --network "eip155:8453" \
  --dry-run

# --dry-run stops after the policy decision. Nothing is signed and nothing is spent.

import { createTx402Client } from "tx402";
// Your signer stays in your process. tools.tx402.io never sees a key,
// never asks for one, and cannot build a payment.
import { signers } from "./signers.js";

const tx402 = createTx402Client({
  signers,
  policy: {
    maxPerRequest: "0.008500 USDC",
    allowedDomains: ["blockrun.ai"],
    allowedNetworks: ["eip155:8453"],
  },
});

// Policy and budget are committed before the signer is reachable, so a
// refusal here is a payment that was never authorized.
const response = await tx402.fetch("https://blockrun.ai/api/v1/pm/kalshi/markets");

from tx402 import Tx402Client, Policy

# Your signer stays in your process. tools.tx402.io never sees a key,
# never asks for one, and cannot build a payment.
tx402 = Tx402Client(
    evm_signer=evm,
    policy=Policy(
        max_per_request="0.008500 USDC",
        allowed_domains=["blockrun.ai"],
        allowed_networks=["eip155:8453"],
    ),
)

# Policy and budget are committed before the signer is reachable, so a
# refusal here is a payment that was never authorized.
response = tx402.fetch("https://blockrun.ai/api/v1/pm/kalshi/markets")

curl -sS 'https://tools.tx402.io/api/v1/inspect?url=https%3A%2F%2Fblockrun.ai%2Fapi%2Fv1%2Fpm%2Fkalshi%2Fmarkets'

# The same result as Markdown, for a terminal or an agent:
curl -sS -H 'Accept: text/markdown' 'https://tools.tx402.io/inspect?url=https%3A%2F%2Fblockrun.ai%2Fapi%2Fv1%2Fpm%2Fkalshi%2Fmarkets'

Public data: the endpoint serves this to anyone who asks. It is shown exactly as it arrived, truncated to the documented cap.

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

SHA-256 of the canonicalized challenge: 826c0af780f2179183b3b32baa691ce8789bc0623fb3b801395c01f9c937ba52

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.

[
  {
    "id": "probe_ok",
    "value": true,
    "observed": true,
    "detail": null
  },
  {
    "id": "challenge_served",
    "value": true,
    "observed": true,
    "detail": null
  },
  {
    "id": "challenge_decodes",
    "value": true,
    "observed": true,
    "detail": null
  },
  {
    "id": "wire_form",
    "value": "v2-header",
    "observed": true,
    "detail": null
  },
  {
    "id": "x402_version",
    "value": 2,
    "observed": true,
    "detail": null
  },
  {
    "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": true,
    "observed": true,
    "detail": null
  },
  {
    "id": "network_recognized",
    "value": true,
    "observed": true,
    "detail": "Recognized means present in the tx402 signed release manifest."
  },
  {
    "id": "asset_recognized",
    "value": true,
    "observed": true,
    "detail": "Recognized means present in the tx402 signed release manifest."
  },
  {
    "id": "facilitator_known",
    "value": null,
    "observed": false,
    "detail": "The challenge named no facilitator."
  },
  {
    "id": "amount_canonical",
    "value": true,
    "observed": true,
    "detail": null
  },
  {
    "id": "amount_magnitude_band",
    "value": "micro",
    "observed": true,
    "detail": null
  },
  {
    "id": "pay_to_wellformed",
    "value": true,
    "observed": true,
    "detail": null
  },
  {
    "id": "pay_to_declared_dynamic",
    "value": false,
    "observed": true,
    "detail": null
  },
  {
    "id": "timeout_sane",
    "value": false,
    "observed": true,
    "detail": "Authorization window 300s exceeds the tx402 maximum of 60s."
  },
  {
    "id": "scheme_known",
    "value": true,
    "observed": true,
    "detail": null
  },
  {
    "id": "requirement_count",
    "value": 1,
    "observed": true,
    "detail": null
  },
  {
    "id": "challenge_size_bytes",
    "value": 345,
    "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."
  }
]