# What does this x402 endpoint charge? **Challenge served, decoder refused it.** `https://news.apitoll.cloud/v1/cointelegraph/news` — Invalid PAYMENT-REQUIRED challenge: json-depth-exceeded ## ENDPOINT | Field | Value | | -------------- | ------------------------------------------------------- | | URL | https://news.apitoll.cloud/v1/cointelegraph/news | | Canonical | https://news.apitoll.cloud/v1/cointelegraph/news | | Endpoint id | 4f7db3895dde5e9f806f2f7835b4458a | | HTTP status | 402 | | Latency | 572 ms | | Redirects | 0 | | TLS | handshake ok | | Wire form | x402 v2 — PAYMENT-REQUIRED header | | Bytes read | 143 | | Observed at | 2026-08-15T15:17:05Z | | Decoder | refused — TX402_PAYMENT_REQUIRED_INVALID | | Decoder detail | Invalid PAYMENT-REQUIRED challenge: json-depth-exceeded | ## PAYMENT ⚠️ The decoder REFUSED this challenge. The terms below were parsed from what the endpoint served so that whoever maintains it can see what we saw — they are **not** terms tx402 would pay. | Field | Value | | ----------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Price | 0.001000 USDC | | Amount (atomic) | 1000 | | Scheme | exact | | Network | eip155:8453 · in the tx402 signed manifest | | Asset | USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 · in the manifest | | Pay to | 0xcc69d619E6053F88A4845066518f465bD06Fc96c | | Pay to declared dynamic | no | | Authorization window | 300s | | Resource | https://news.apitoll.cloud/v1/cointelegraph/news | | MIME type | application/json | | Description | Latest crypto news and breaking headlines, real-time from Cointelegraph. Search any topic (bitcoin, ethereum, DeFi, regulation, market sentiment) or pull the live feed, with full article text across 14 languages. Built for agents tracking crypto markets, tokens, and Web3. | | Facilitator | not observed | ## OBSERVED | Field | Value | | ------------------ | -------------------- | | First seen | 2026-08-15T04:00:12Z | | Last seen | 2026-08-15T15:17:05Z | | Scans recorded | 3 | | Availability (30d) | not measured yet | | Latency p50 | not measured yet | | Changed at | What changed | | -------------------- | ----------------------------------------------------------------------------------------------- | | 2026-08-15T04:45:45Z | first_seen: challenge_hash — → 1938aee7ca712d7965eb2f3e257d32f6dbe4b04aafe6e70cabc2dfd24a341f2e | ## SECURITY **The strict decoder refused this challenge** (`TX402_PAYMENT_REQUIRED_INVALID`), which is the finding that matters most here. 0 failed, 1 warned, 15 passed. Those checks describe what could still be determined from what the endpoint served. A check that could not run reports `skip` and is never counted as a pass. | Check | Detail | | ---------------------------------- | ----------------------------------------------------------------------------- | | pass wire_form_detected | Served as v2-header. | | skip base64_strict | The decoder refused the challenge; the framing cannot be reported separately. | | pass json_wellformed | — | | pass x402_version_known | Declared x402Version 2. | | pass accepts_present | The challenge offers 2 ways to pay. | | pass size_within_limit | Read 143 bytes, within the probe's cap. | | pass network_caip2_wellformed | network: eip155:8453 | | pass network_recognized | Recognized means present in the tx402 signed release manifest. | | pass asset_recognized | Recognized means present in the tx402 signed release manifest. | | pass amount_atomic_canonical | — | | pass amount_positive | — | | pass pay_to_wellformed | — | | warn max_timeout_sane | Authorization window 300s exceeds the tx402 maximum of 60s. | | pass resource_origin_match | — | | pass scheme_known | — | | skip facilitator_known | The challenge named no facilitator. | | pass mime_type_wellformed | mimeType: application/json | | pass extra_wellformed | `extra` carries 2 field(s), preserved verbatim. | | skip amount_within_observed_range | No prior observations of this endpoint. | | skip recipient_matches_observed | No prior observations of this endpoint. | ## RISK — MEDIUM (72/100) score_version `v1` · confidence `static_only` · 12 signals scored 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. | Signal | Weight Finding | | ------------------------------- | --------------------------------------------------------------------------------------------- | | fail challenge_decodes | 25 The challenge does not decode under the strict x402 decoder tx402 uses before paying. | | pass resource_origin_match | 15 The challenge describes the endpoint that served it. | | pass amount_canonical | 12 The amount is a canonical atomic integer. | | pass pay_to_wellformed | 12 The recipient is a well-formed address for the declared network. | | pass network_recognized | 8 The network is in the tx402 signed release manifest. | | pass asset_recognized | 8 The asset is in the tx402 signed release manifest for this network. | | skip facilitator_known | 0 The challenge named no facilitator. | | pass scheme_known | 6 The payment scheme is one tx402 can route. | | pass tls_ok | 5 The endpoint was reached over a valid TLS connection. | | warn timeout_sane | 4 The authorization window is outside the maximum tx402 will sign for. | | pass redirect_scheme_downgrade | 3 No redirect downgraded the connection. | | pass wire_form | 3 The endpoint serves the x402 v2 header form. | | pass amount_magnitude_band | 2 The amount is within the range we see for x402 endpoints. | Methodology: https://tools.tx402.io/methodology?v=v1 ## TEST WITH TX402 Nothing below sends a key anywhere. tx402 commits policy and budget before the signer is reachable, so a refusal is a payment that was never authorized. ```bash npx tx402 call "https://news.apitoll.cloud/v1/cointelegraph/news" \ --max-spend "0.001000 USDC" \ --network "eip155:8453" \ --dry-run # --dry-run stops after the policy decision. Nothing is signed and nothing is spent. ``` ```ts 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: "0.001000 USDC", allowedDomains: ["news.apitoll.cloud"], 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://news.apitoll.cloud/v1/cointelegraph/news"); ``` ```python 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="0.001000 USDC", allowed_domains=["news.apitoll.cloud"], 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://news.apitoll.cloud/v1/cointelegraph/news") ``` --- | Representation | URL | | -------------- | --- | | HTML | https://tools.tx402.io/inspect?url=https%3A%2F%2Fnews.apitoll.cloud%2Fv1%2Fcointelegraph%2Fnews | | Markdown | https://tools.tx402.io/inspect.md?url=https%3A%2F%2Fnews.apitoll.cloud%2Fv1%2Fcointelegraph%2Fnews | | JSON | https://tools.tx402.io/api/v1/inspect?url=https%3A%2F%2Fnews.apitoll.cloud%2Fv1%2Fcointelegraph%2Fnews | | History | https://tools.tx402.io/history?url=https%3A%2F%2Fnews.apitoll.cloud%2Fv1%2Fcointelegraph%2Fnews | Decoded by `tx402@0.2.0` — the same strict decoder the SDK runs before it pays.