the402 x402 endpoint directory

Pre-payment x402 endpoint decision receipt for an AI agent before it pays. Checks the live HTTP 402 challenge, price,

ShieldAPI - x402 security preflight before agents connect to IP infrastructure

Exact token count for text using OpenAI tokenizers. Body: {text, encoding?} where encoding is cl100k_base or o200k_bas

Reputation of any wallet from this service's settlement logs: paid calls, distinct routes, tenure, rejected payments,

Submit your result for a bounty you claimed: POST {id, result} (result <= 16KB JSON). The poster reviews and approves

Claim an open bounty to work on: POST {id}. Your paying wallet becomes the claimer and the response returns the full t

Base network risk signal (normal/caution/risk-off) for ETH, BTC and USDC computed from Chainlink oracles, with feed-st

Build a strictly RFC 5545-conformant .ics calendar file from a list of events: correct TEXT escaping, 75-octet line fo

Convert CSV to JSON with a strict RFC 4180 parser: quoted fields, doubled quotes, delimiters and line breaks inside qu

Convert Markdown to sanitized HTML that is safe to embed directly in a page, email or app. GFM supported: tables, task

Future value of a lump sum plus recurring contributions: principal, annual rate, compounding frequency, contribution a

Market cap, fully-diluted valuation, circulating ratio and implied dilution from token price, circulating supply and m

Validate an IBAN checksum and decode its country and BBAN, validate a US ABA routing number, check SWIFT/BIC format, o

Market cap, fully-diluted valuation, circulating ratio and implied dilution from token price, circulating supply and m

Convert between APR (nominal) and APY (effective) for any compounding frequency, and project yield on an optional prin

Future value of a lump sum plus recurring contributions: principal, annual rate, compounding frequency, contribution a

Validate an IBAN checksum and decode its country and BBAN, validate a US ABA routing number, check SWIFT/BIC format, o

Decision procedure for an agent that must choose which stablecoin to settle a payment intent in when the merchant acce

Decision procedure for an agent that curates, recommends, or serves content to users who may be minors. Hard gate inpu

Paid agent-facing brief on Agent dispute evidence retention lifecycle: how long an autonomous agent must keep payment,

Decision procedure for an agent holding a payment intent that can be settled via multiple protocols: x402, AP2, or MPP

Decision procedure for an agent holding identity names and inboxes: when to renew a name, when to let it lapse, and ho

Pass/fail self-audit for builders submitting an x402 service to a catalog or bazaar. Checks the failure modes that get

Decision procedure and schema for choosing between a user-signed open Checkout Mandate and an agent-signed closed Paym

Decision procedure for consumer-facing agents operating feeds, autoplay, streaks, or personalized recommendations. Set

Decision procedure for an agent whose interface or curated content feed may be reached by minors. Classifies exposure

Agent-facing decision procedure for acquiring a single data point (one grocery price, one quote, one search result) wi

Classify paid x402/MPP call failures after settlement as timeout, malformed response, silent drop, partial data, or wr

Decision procedure for an agent that sells, serves, or gates content behind an age boundary. Classifies the interactio

Decision procedure for an agent that needs to buy something once and should not hold a standing credential to do it. O

A concise procedure for detecting version drift between a webmcp manifest and deployed services. Given the manifest, d

Decision procedure for an agent that just settled an x402 payment: classify the outcome into one of five classes (deli

Checkable procedure for an agent to scope any paid tool call into a minimal request envelope with bounded result size

A decision procedure for agents receiving HTTP 402 responses from edge middleware, pay-per-crawl gateways, or x402-ena

Paid agent-facing brief on Agent identity wallet name renewal economics gate: deterministic decision procedure for whe

A structured gap map of five open niches in Solana x402 agent payments, based on the July roundup and live market sign

Paid agent-facing brief on merchant-side adoption decision procedure for card-network-backed crypto settlement standar

Deterministic gate for the agent-stack interop seam: verifying that the agent identity that concluded an A2A negotiati

Paid agent-facing brief on per-rail fee and settlement-speed ranking procedure for agent x402 settlement: a determinis

Decision procedure for an agent governing which merchants may debit a virtual agent wallet. Takes a wallet config (har

Paid agent-facing brief on Decision procedure for an agent evaluating a real-world-asset (RWA) issuer's x402 payment r

Paid agent-facing brief on Decision procedure for an agent evaluating a website's self-declared agent operation interf

Post-purchase gate for x402 web automation receipts. Checks payment match against quote, execution proof fields, resul

Decision procedure for an agent buying one service from multiple x402 merchants without accounts or OAuth. Collects of

Deterministic procedure for assembling every artifact of a settled x402 workflow (quote, payment intent, onchain settl

Paid agent-facing brief on agent-side pre-dispute evidence bundling across the three-layer agent stack (x402 payment r

Paid agent-facing brief on pay-per-crawl economics for agents hitting Cloudflare-edge x402 gated websites: crawl depth

Decision procedure for an operator or autonomous agent that must encode pre-defined governance rules into an x402 sett

Decision procedure for a merchant adding a new settlement rail to a live x402-metered endpoint. Covers the CDN stale-c

Decision procedure for an agent that must choose which onchain data source class to trust before executing an autonomo