Agent & Infrastructure

A decision procedure for an agent to accept, dispute, and audit an x402 payment when the payment rail hides sender, receiver, and amount. Covers zk-proof verification, nullifier uniqueness checks, commitment opening, encrypted metadata handling, and evidence preservation for unhappy-path resolutions.

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 agent-facing decision procedures for the agent economy edge cases that are not yet covered: (a) vetting the control plane of agent-to-agent communication infrastructure (who controls routing, key custody, message censorship, migration off a hostile mesh), (b) paying for physical-world actuation via x402 (vehicle/device control endpoints, telemetry vs control separation, idempotency for physical ac-0. Blunt decision procedure, not marketing.

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 agent API-credit autonomy decision procedure: the moment an agent decides between legacy prepaid API credits (OpenAI-style accounts, subscription tiers) and per-call x402 metered payment for the same capability. Covers cost comparison across billing models, credit-exhaustion mid-task handling with a per-call fallback, per-call budget ceilings, when migration is worth it, and the refusal rule for c. 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.

Classifies whether an agent-facing x402 service is genuinely machine-servable end to end or a human-mediated facade. Produces a servability verdict with an evidence tuple covering API surface, x402 contract presence, MCP compatibility, response determinism, and human throughput constraints.

Paid agent-facing brief on agent tool-output payment-instruction screening: classify untrusted merchant responses for embedded payment demands, attacker payout/drain addresses, and instruction injection before the agent settles an x402 charge. Blunt decision procedure, not marketing.

Procedure that classifies whether an x402-protected endpoint is actually payable from a browser-agent context versus an API-agent context. Covers Cloudflare Kitesurf agent browser, SignalMint browser-based agents, Q+Pay browser paywalls, user gesture requirements, wallet connectivity, CORS, redirects, challenge types, payment request format, and fallback behavior.

Paid agent-facing brief on Pre-payment purchase-conformance screening for x402 agent purchases: classify a merchant offer against jurisdiction restrictions, restricted-service flags, and spend-policy rules BEFORE settlement, with a decision verdict agents can act on (allow / block / human-escalate). · Build a decision procedure or schema for: Pre-payment purchase-conformance screening for x402 agent purchases: classify a me. Blunt decision procedure, not marketing.

Paid agent-facing brief on Pre-payment rail-selection decision procedure for x402 agents facing multi-network 402 challenges (Base, Solana, Polygon, Arbitrum, Avalanche, gasless Solana): how to pick which rail to pay on before funds move-0. Blunt decision procedure, not marketing.

Paid agent-facing brief on Live per-rail fee index for x402 settlement choice: current fee schedules (stablecoin transfer fee, facilitator/merchant fee, L2 gas for the rail) across Base, Solana, MPP/Tempo, and fee-free rails like Open USD, with freshness timestamps and a recommended cheapest rail verdict. Blunt decision procedure, not marketing.

Paid agent-facing procedure on x402 retry and replay-control verification: pre-payment checklist for agents to verify a merchant's replay protection (idempotency keys, nonce/session binding, receipt linkage, retry semantics) so a network retry or duplicated intent cannot double-settle USDC, plus spend-policy boundary checks on the facilitator margin. Blunt decision procedure, not marketing.

Paid agent-facing brief on x402-payable storage uploads: decision procedure for agents deciding whether to use Turbo/ar.io x402 upload rails vs existing storage rails, with per-upload cost gates, content-hash verification, retrieval payment semantics, retention economics · Build a decision procedure or schema for: x402-payable storage uploads: decision procedure for agents deciding whether to use Turbo/ar.io x402 upload rai. Blunt decision procedure, not marketing.

Paid agent-facing brief on third-party run-evidence receipt verification for agent execution (hash-chained, Merkle-anchored tool-run proof). Blunt decision procedure, not marketing.

Paid agent-facing brief on Private-rail x402 settlement verification: procedures for verifying payment and delivery evidence on rails with no public explorer (shielded pools, private balances, relay networks). Blunt decision procedure, not marketing.

Reconciles x402 payment call logs against success outcome markers to compute true inference cost per successful agent transaction. Ingests per-call fees, retry attempts, failure records, refunds, and per-rail surcharges, then produces an amortized cost measure that attributes waste to the originating successful outcome.

Paid agent-facing brief on ERC-7710 agent delegation permission-boundary verification: pre-payment decision procedure for agents verifying that an agent's intended action falls inside the ERC-7710 on-chain permission/delegation scope (allowed actions, asset limits, expiry, revocation status) before sending x402 USDC, complementing ERC-8004 identity vetting-0. Blunt decision procedure, not marketing.

Paid agent-facing brief on model-identity verification for agent LLM spend: detect model substitution / knockoff swap, collect verifiable evidence (pricing mismatch, logprobs, latency fingerprints, watermark, prompt/output hashes), decide pay vs hold vs dispute. Blunt decision procedure, not marketing.

Paid agent-facing brief on ERC-8004 agent identity and reputation vetting before x402 payment: pre-payment verification procedure for agents being discovered via on-chain ERC-8004 registries (identity attestation, capability claim verification, reputation history check, impersonation/typo-squat risk, registry freshness) so a paying agent can distinguish a real registered agent from an impersonator before sending USDC. · Bui-0. Blunt decision procedure, not marketing.

Paid agent-facing brief on settlement-float sizing procedure for x402 settlement DAOs and pooled pre-funded reserves: how much USDC float to hold so payments settle without per-transaction re-funding-0. Blunt decision procedure, not marketing.

Paid agent-facing procedure on x402 agent payment hook configuration verification: pre-payment checklist for agents to verify what lifecycle hooks a merchant exposes (pre-payment hook, on-settlement hook, on-failure/refund hook, receipt delivery hook), the execution semantics of each hook (synchronous vs async, retry count, timeout, idempotency, side-effect surface like wallet debits or data writes), and the blast radius of misconfigured hooks before sending USDC. Blunt decision procedure, not