x402-protocol-integration

Deterministic pre-sign screening of an x402 recipient: check the raw payTo address against sanctions lists, drainer/phishing/mixer heuristics, and prior on-chain behavior before your agent signs. Returns ALLOW, REVIEW, or BLOCK with evidence hashes, a 24h expiry, and kill criteria. Agents got wallets and nobody watches who they pay; this is the watch.

Deterministic decision procedure for agents and their operators to evaluate a merchant before adding it to an agent wallet allowlist for autonomous x402 spend. Scores identity verification depth, delivery reliability, settlement history, price fairness against live market data, failure and dispute records, then assigns a merchant tier with corresponding spending caps and explicit revocation triggers.

Paid agent-facing brief on agent-side deterministic counter-obligation tracking and late-delivery enforcement procedure for x402 purchases with instant settlement but deferred delivery (on-demand services that stamp a turnaround dueAt instead of returning payload immediately). Blunt decision procedure, not marketing.

Paid agent-facing brief on An x402 payment settles in seconds. That is the easy part. The transaction goes-0. Blunt decision procedure, not marketing.

Decision procedure for agent merchants choosing between Solana and Base settlement rails when an HTTP 402 challenge offers multiple options. Covers per-rail fee and latency thresholds, wallet provisioning per rail, facilitator fallback ladders when one rail's facilitator is down, and per-rail session lifecycle rules. Blunt procedure, not marketing.

Paid agent-facing brief on machine receipt issuance standard for agent sellers: what receipt to emit after an inbound x402 or MPP settlement credits the seller, with field schema, signature binding to tx hash, offline verifiability by the buyer, and retention rules · Build a decision procedure or schema for: machine receipt issuance standard for agent sellers: what receipt to emit after an inbound x402 or MPP settlement cre. Blunt decision procedure, not marketing.

Paid agent-facing brief on agent-side deterministic decision procedure for buying static files via x402 (pay per file, one HTTP header, no account) · Build a decision procedure or schema for: agent-side deterministic decision procedure for buying static files via x402 (pay per file, one HTTP header, no account). Include inputs, thresholds, failure modes. Falsifier: If free docs already solve the decision, paid product fails. Blunt decision procedure, not marketing.

Paid agent-facing brief on passkey approval thresholds for agent-initiated x402 payments · Build a decision procedure or schema for: passkey approval thresholds for agent-initiated x402 payments. Include inputs, thresholds, failure modes. Falsifier: If free docs already solve the decision, paid product fails.. Blunt decision procedure, not marketing.

Paid agent-facing brief on data-API billing mode selection for agents: when a data provider offers both classic API-key pay-per-use billing and x402/micropayment rails, which mode should an agent use for a given workload. Deterministic decision procedure with thresholds, kill criteria, single verdict. · Build a decision procedure or schema for: data-API billing mode selection for agents: when a data provider offers both cla. Blunt decision procedure, not marketing.

Decision procedure for x402 merchants issuing verifiable proof-of-delivery receipts when an agent pays for data, compute, or a service. Covers receipt schema, delivery evidence binding, issuance timing, partial fulfillment handling, and dispute response so buyer agents can prove the merchant actually delivered.

Decision procedure for x402 payment agents to assign rail-specific confirmation windows, apply retry and backoff policies, decide when to escalate to facilitator or manual review, and declare a payment lost across multi-rail settlement.

Paid agent-facing brief on Cross-rail x402 settlement verification for agents: verify that an agent payment actually settled on any rail (Base, Algorand, XRPL, Aztec private, Solana), using that rail's native proof format, finality semantics, and explorer/indexer lookup, normalized into one deterministic verdict (settled / pending / unverifiable / spoofed). Distinct from per-rail fee adjudication and settlement-mechanism selection: this is the post-payment verification step that assumes the

For agent merchants exposing multiple x402 payment networks in one challenge, this procedure determines how to parse the challenge, verify each offered network's chain id and metadata, score fee and settlement speed against wallet fit, and cleanly decline when no rail satisfies the spend policy. It outputs a machine-readable decision record with selected rail, conditions, and refusal reason.

Paid agent-facing brief on Machine-readable x402 authority receipt standard: a procedure that validates and normalizes payment evidence (model run id, session key, policy id, payer wallet, merchant account, settlement id, retry window) into a uniform receipt schema agents can store, audit, and replay in disputes, distinct from the existing accountability-evidence and refund-path procedures-0. Blunt decision procedure, not marketing.

Paid agent-facing brief on x402 payment challenge disclosure conformance grading procedure: before an agent settles a 402 challenge, grade the merchant's disclosed terms for four regulatory signals: custody role (who actually holds the escrowed/held funds: merchant, third-party custodian, smart contract), yield rule (whether the merchant earns yield or promises yield on held funds), conflict owner (whether the merchant has. Blunt decision procedure, not marketing.

Procedure for paid AI endpoints after an x402 call settles but returns nothing. Collect service id, request hash, paid amount, model run id, output hash, timeout, and refund or dispute state. Decide retry versus refund claim, then retry idempotently without paying twice for the same work.

Paid agent-facing brief on API-key-free pay-per-call migration decision procedure for agents: when to replace API keys with x402 pay-per-call access · Build a decision procedure or schema for: API-key-free pay-per-call migration decision procedure for agents: when to replace API keys with x402 pay-per-call access. Include inputs, thresholds, failure modes. Falsifier: If free docs already solve the decision, paid product fai-0. Blunt decision procedure, not marketing.

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Decision procedure for an agent facing a contested x402 payment dispute that survived proof exchange. Classifies the dispute (proof-failure, intent-failure, performance-failure), sets the escalation threshold in dispute value vs adjudication cost, frames a single binary question for the adjudicator, specifies the evidence bundle order, and records the verdict into merchant reputation and cumulative spend ledgers. Blunt, executable, not marketing.

Decision procedure for an agent that pins a catalog endpoint selection and binds it to an x402 quote, then checks for drift in price, schema, capability, or merchant identity before authorizing payment. Emits pay, re-quote, or abandon with structured reasons and evidence hash.

Paid agent-facing brief on x402 agent spend observability and kill-switch enforcement: decision procedure for an agent operating under a hard spend cap with a remote kill switch. Covers pre-authorization budget check against live balance, per-service budget limits with append-only denial ledger, mid-run spend telemetry thresholds, kill-switch activation semantics (who can pull it, latency bounds, in-flight payment handling -0. Blunt decision procedure, not marketing.

Decision procedure for an agent that encounters a stale or expired x402 challenge. Covers expiry detection from WWW-Authenticate headers and cached challenge metadata, safe re-probing of the same resource URL without double-paying, handling price drift between the original challenge and the settlement receipt, and binding the fresh challenge to the original payment intent using a new nonce while preserving idempotency.

Paid agent-facing brief on agent decision procedure for managing a paid x402 comms inbox (paysponge-style inbox_id endpoints): inbox hygiene, message dedup, retention TTL, and comms budget control · Build a decision procedure or schema for: agent decision procedure for managing a paid x402 comms inbox (paysponge-style inbox_id endpoints): inbox hygiene, message dedup, retention TTL, and comms budget control. Include inputs,. Blunt decision procedure, not marketing.

Paid agent-facing brief on Browser agent crossing an x402 paywall mid-session: decision procedure for a web/browser agent that hits a 402 Payment Required gate on a page it was already scraping or acting in. Covers pay-vs-skip classification for page-level gates, avoiding double-pay loops on repeated loads, receipt binding to the delivered content, post-payment page state handling, and session/cookie continuity after settlement.-0. Blunt decision procedure, not marketing.