Saylor Innovations x402 Endpoint x402 REST usage
x402 endpoint validator - checks a URL returns a well-formed 402 challenge with valid accepts per network
0.01 USDC per call
per call
Preflight
44 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
Crawl Pre-Flight x402 REST usage
Crawl pre-flight for a domain: will you be blocked, is content behind a paywall, and how much is actually there. Returns per-bot robots.txt verdicts for 16 AI crawlers, crawlable page count from sitemaps, detected CDN an...
0.02 USDC per call
per call
x-preflight x402 REST usage
X Preflight: read a draft post against X's open-sourced ranking code. Returns what is already settled before you post, whether it enters the pool strangers are drawn from, how long it stays retrievable, which filters del...
0.01 USDC per call
per call
Agent Miner Tools x402 REST usage
Use before spending tokens, money or crawler capacity fetching an unfamiliar web resource. Resolves redirects (manually, bounded, re-validated per hop) and returns deterministic HTTP/resource facts — final URL, status, c...
0.003 USDC per call
per call
Simulate x402 REST usage
Pre-flight an x402 payment: decode the endpoint's challenge, report the cost on every rail (Base and Solana) and the cheapest, and — with a payer address — verify the wallet can afford the call on Base.
0.003 USDC per call
per call
x402 Pre-Payment Check x402 REST usage
Before paying an unknown x402 endpoint, ask for a verdict. Checks the live 402 response without paying, compares the price with its market category, shows real usage from the Coinbase Bazaar (payers, repeat buyers, last...
0.002 USDC per call
per call
AveDaris Agent Utilities x402 REST usage
Check a UUID: send a string and get whether it is a valid UUID plus its version and variant. $0.001 USDC per call on Base.
0.001 USDC per call
per call
Plainsight x402 REST usage
Live crypto prices: USD spot for BTC, ETH and SOL in one call, fetched per call (not cached), so the figure is the number right now. A cheap, high-frequency data lane for x402 buyers budgeting in the unit they pay with....
0.001 USDC per call
per call
ZeroWorker Web Action API x402 REST usage
Avoid unnecessary browser launches with a lightweight preflight for AI agents. ZeroWorker inspects public pages before browser automation and returns static forms, field constraints, CAPTCHA/SPA signals, DNS/public-netwo...
0.003 USDC per call
per call
EVM Nonce Gap Check x402 REST usage
EVM Nonce Gap Check: calculates the gap between pending and proposed transaction nonces using only bounded caller-supplied values. Call when you need a bounded evm nonce gap check result before signing, submitting, repla...
0.001 USDC per call
per call
wallet-can-pay x402 REST usage
Check whether a Base wallet holds enough USDC to pay an x402 amount (default $0.001). Returns balance, can_pay, shortfall. The checklist agents run before spending. Try GET /can-pay/sample.
0.001 USDC per call
per call
EVM Amount Min Check x402 REST usage
EVM Amount Min Check: checks an actual raw amount against a minimum raw amount using only bounded caller-supplied values. Call when you need a bounded evm amount min check result before signing, submitting, replacing, or...
0.001 USDC per call
per call
EVM Finality Depth Check x402 REST usage
EVM Finality Depth Check: checks confirmation count against a caller-required depth using only bounded caller-supplied values. Call when you need a bounded evm finality depth check result before signing, submitting, repl...
0.001 USDC per call
per call
EVM Priority Fee Ratio x402 REST usage
EVM Priority Fee Ratio: calculates the priority-fee share of the total fee cap using only bounded caller-supplied values. Call when you need a bounded evm priority fee ratio result before signing, submitting, replacing,...
0.001 USDC per call
per call
EVM Signature V Classify x402 REST usage
EVM Signature V Classify: classifies common signature recovery and EIP-155 v values using only bounded caller-supplied values. Call when you need a bounded evm signature v classify result before signing, submitting, repl...
0.001 USDC per call
per call
EVM Slippage Bounds Check x402 REST usage
EVM Slippage Bounds Check: checks expected and minimum output against a maximum slippage policy using only bounded caller-supplied values. Call when you need a bounded evm slippage bounds check result before signing, sub...
0.001 USDC per call
per call
EVM Token Balance Budget x402 REST usage
EVM Token Balance Budget: checks caller-supplied raw token balance against transfer amount using only bounded caller-supplied values. Call when you need a bounded evm token balance budget result before signing, submittin...
0.001 USDC per call
per call
EVM Transfer Recipient Check x402 REST usage
EVM Transfer Recipient Check: compares an encoded recipient address with the intended recipient using only bounded caller-supplied values. Call when you need a bounded evm transfer recipient check result before signing,...
0.001 USDC per call
per call
Forest Gas Station x402 REST usage
Check whether an isolated cart can reach checkout and expose blockers without payment. It never logs in, creates an order or finalizes checkout.
no price published
x402 Preflight x402 REST usage
Payability preflight: audits an x402 seller's 402 challenge
no price published