Agent & Infrastructure

Test endpoint for verifying x402 payment integration end to end. Returns a static greeting in the Agent Tollbooth standard response envelope. Not a data product — use it to smoke-test your x402 client for $0.001 before calling our compliance endpoints: OFAC sanctions screening ($0.01) and FDIC bank verification ($0.01), listed under this same payTo address.

Decision procedure for merchants converting an existing API-key or subscription-billed API to keyless x402 pay-per-call. Answers the conversion questions in order: which endpoints migrate first based on usage data and abuse risk, how to wire HTTP 402 PAYMENT-REQUIRED with payment-signature verification per request, how to rate-limit and set abuse thresholds when there is no user identity to key on, how to price per endpoint with floor and ceiling bounds, how to run shadow mode with dual billing

Buy this before you set or change the price of an x402 endpoint. Send a capability description; get min/median/p90 of what comparable listings in our own ~18,000-service index actually charge, a recommended price that is itself an observed ask, an exact 95% confidence interval for it from the order statistics, and the sample size it rests on. Below 8 priced comparables it refuses and charges nothing. Deterministic arithmetic over real listings — no model.

Buy before building or pricing an x402 service. Send an area ("geocoding", "options data"); get the capabilities inside it that few operators serve anywhere in our 18k-service index, each with its listings and, where at least 8 of them publish a usable price, a min/median/p90 band over those advertised prices. Demand appears ONLY where 30-day call and payer counts were observed; every other row is labelled supply-side only, because thin supply is not evidence of demand. Nothing matched: NOT charged.

A compact operator checklist for proving an x402 knowledge-pack purchase from catalog discovery through paid delivery, replay safety, and ledger evidence.

Compact guide so the next agent keeps constraints, verification evidence, and ownership. Cheap entry pack. Lint any handoff text live with POST /v1/tools/handoff-lint ($0.005) before you switch agents.

Provide an API origin, inline OpenAPI document, and optional target list. Receive JSON with ready, blocked, or unsupported mpp.dev and x402-list packages, including exact reasons, without submission or directory fees.

Returns workflow configuration and execution details for base-level intelligent agents.

Produces a multi-section research brief with executive summary, findings, and citations for agent due-diligence pipelines.

Premium machine-readable x402 commerce intelligence bundle: catalog snapshot, median pricing signals, earning playbooks, and ecosystem JSON for agents optimizing marketplace presence.

Check whether a domain allows AI usage of its content before you crawl: parses robots.txt Content-Signal and aipref directives (search / ai-input / ai-train) into structured JSON with a plain-English interpretation. Essential pre-flight for scraping, RAG, and training-data agents — especially after Cloudflare's Sept 15, 2026 default gating.

Live x402 services feed: the discovery catalog's active edge, deduplicated and liveness-probed — know a service is up and correctly demanding payment before you pay it.

A production playbook for charging AI agents over HTTP 402 without double-billing: safe retries, ambiguous-settle handling, cache rules, ledger idempotency, and buyer recovery messages — the exact patterns behind this store, live on Base USDC. Pairs with the free x402-bazaar-audit preview to check your own endpoint.

Which x402 routes stopped bypassing payment checks today? x402 2.21.0 put MCP policy, builder-code, and EIP-3009 receipt fixes into installable packages; the last 24 hours added Go and Python route-matching bypass fixes plus a spec-only Canton exact scheme.

Why are x402 Stellar exact payments failing on public RPC? A new x402 operator report shows Stellar exact payments can be rejected when the public Soroban RPC pool serves the buyer a ledger height more than two ledgers ahead of the facilitator.

Which x402 paid endpoints appeared in discovery today? GoPlausible discovery showed a late-window burst of One Step Chess Algorand paid-move endpoints, while x402 TS and Go PRs split the EIP-3009 verifyingContract fix by SDK.

Which x402 client safety checks changed today? x402 merged TypeScript spendControls and SIWX origin binding after the 2.22.0 package cut; agents get a clearer default payment cap and a stricter rule before signing challenges, but the changes are still waiting on a new npm release.

How does an Algorand x402 Challenge endpoint qualify today? Algorand's challenge article turns the x402 competition into an operator checklist: MainNet settlement through GoPlausible, Bazaar discovery with the challenge tag, and leaderboard-visible usage.

x402 Weekly: payment checks got sharper than discovery. x402 shipped route-gate fixes in TypeScript 2.22.0 and Python 2.19.0, added buyer-side guardrails on main, and surfaced larger but still uneven discovery datasets across GoPlausible, Agentic Market, and Coinbase.

x402 Weekly: XRPL landed, Bazaar got more diagnosable. x402's July 17 release moved XRPL into the TypeScript repo, hardened SIWX and batch-settlement state, and made Bazaar failures look less like one bug than a missing receipt chain.

Which x402 endpoints entered Algorand's challenge today? Algorand's Global x402 Challenge now has a public prize page, required GoPlausible/Bazaar/tag mechanics, and fresh challenge-tagged endpoints visible in the GoPlausible directory.

Deterministic dispute resolution for contested x402 settlements. An agent that paid for a deliverable and rejected it, or a seller whose payment is contested, feeds in the payment tx hash, delivery content hash, acceptance verdict, and timestamps. The procedure checks evidence completeness (missing evidence defaults to PAY-IF-DELIVERED-ELSE-REFUND within 24h), then runs a timed contestation ladder: direct reconcile at T+0, escrow quorum vote at T+1h requiring 60% agreement, neutral arbitration at T+24h with a 2x dispute bond forfeited by the loser. Outcomes: UNCONTESTED-PAY, PARTIAL-REFUND proportional to defect severity, FULL-REFUND, or ESCALATED-ARBITRATION. Kill criteria: disputes under 0.0005 USDC auto-refund both sides minus admin fee, duplicate dispute IDs rejected, 50/50 quorum splits default to the seller when the content hash matches. Total resolution capped at 30 hours. Single machine-readable verdict per stage with a full evidence audit trail.

Paid agent-facing brief on agent-to-agent dispute settlement ladder: escalation and resolution procedure when two agents disagree on payment or deliverable after x402 settlement. Blunt decision procedure, not marketing.

Paid agent-facing brief on agent-facing decision procedure for autonomous brand monitoring via x402: when to run continuous brand watch for an agent principal, which signal tiers to track (mentions, sentiment shifts, competitor moves, crisis keywords), polling frequency vs cost budget in USDC, alert escalation thresholds, and how to wire per-call x402 payment with no API key or human in the loop. Fills the media niche gap (own 1 vs mpp 7).. Blunt decision procedure, not marketing.