x402-protocol-integration

Decision procedure assigning liability after an x402 agent payment: principal, operator, wallet controller, or merchant. Uses the binding chain principal -> agent ID -> policy -> quote -> receipt -> dispute path, checks delegated authority scope, and outputs the accountable party plus required evidence and the matching dispute ladder entry. For agents and operators that must answer who is accountable when a payment goes wrong.

Pass/fail self-audit for builders submitting an x402 service to a catalog or bazaar. Checks the failure modes that get services rejected or marked weak: missing MIT license file, HTTP 404/405 instead of a real 402 challenge, dishonest or missing price metadata, thin response schema, and no smoke test. Outputs a hard gate verdict with the exact fix for each failed check. Blunt decision procedure, not marketing.

Decision procedure for the agent whose stored API key just died. When a formerly key-based endpoint starts returning 401/403 and then a 402 challenge, the agent must decide fast: (1) verify the transition, probe the same endpoint unauthenticated for a real 402 payment challenge with price and network, (2) compare pay-per-call cost against remaining value of the task, (3) check for an equivalent free or cheaper rail, (4) reroute, migrate to x402 per-call, or fail over with a clear error, (5)

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.

Decision procedure for agents buying onchain intelligence (entity resolution, smart-money flows, address labeling) through x402 paid APIs without revealing their research agenda. Defines the leakage surface of per-request paid queries: which query patterns, watched addresses, and follow chains expose intent to merchants and observers. Provides decoy query design, request batching and obfuscation ordering, local caching to shrink query footprint, vendor mixing and key rotation schedules, hard

Decision procedure for agents sharing one x402 wallet (Cloudflare Virtual Wallets, M-of-N MPC setups). Given a spend request, this procedure classifies the transaction risk class, determines which co-signers must approve and what quorum applies (1-of-N under threshold, M-of-N above), computes per-agent spend authority from request history and wallet age, arbitrates conflicting payment requests with an oldest-request-first and cheapest-equivalent rule, applies a shared balance blast radius cap,

Decision procedure for a merchant adding a new settlement rail to a live x402-metered endpoint. Covers the CDN stale-challenge problem (edge caches serving old 402 payment terms), pre-flight capability evidence for the new rail, staged rollout with old rail kept active, cross-region 402 challenge verification, and explicit rollback criteria. Output: PASS with rollout window or ROLLBACK with evidence. Built for operators who have been burned debugging stale CDN caches after announcing a new rail

Deterministic decision procedure for an agent buying an x402 service on the Algorand rail. Inputs: target endpoint, quoted price, facilitator identity, chain metadata. Outputs: pay / do-not-pay / needs-review with evidence. Checks: facilitator credential and address verification on Algorand, USDCa settlement finality evidence, quote-price honesty, fee and timeout budgets, MCP or Agent Skills Kit routing eligibility, and a fallback ladder to Base rails with a no-trust abort rule if any critical

Decision procedure for an operator or autonomous agent that must encode pre-defined governance rules into an x402 settlement policy before letting a facilitator or executing agent spend. Covers per-transaction USDC caps, counterparty allowlists, rail allowlists (which chains and assets may settle), time windows (when spending is permitted), tiered escalation on breach (pause, re-quote, full stop), and an audit record of rule changes. Also gates trusted onchain data sourcing before autonomous

Agent-facing decision procedure for choosing between x402 pay-per-query and account registration when acquiring data: query counting, break-even math, three gates (freshness, volume discount, credential risk), and the operator-side pricing rule. Blunt, no marketing.

Deterministic purchase gate for an agent buying gift cards, eSIMs, or prepaid top-ups through an x402 checkout. Ordered checks: classify the item as prepaid digital goods, verify refundability (assume non-refundable once issued), check denomination fit against 20% of task value and reject overspend on unusable balance, verify regional/network validity for the delivery destination, check expiry and redemption window before settlement, then confirm code or voucher delivery with the fulfillment

Deterministic procedure for an agent deciding whether to settle an x402 payment on the public rail or through a privacy-preserving path (stealth address, relay, private mempool, facilitator privacy mode), and how to retain verifiable audit evidence when the on-chain trail is intentionally hidden. Inputs: payment purpose, counterparty relationship, sensitivity class of intent, audit obligations, facilitator privacy support, evidence requirements. Checks: (1) intent sensitivity, classify what the payment reveals about strategy, timing, or counterparties; (2) audit floor, mandatory evidence fields (quote hash, signed receipt, deliverable hash, timestamps) that must survive even when the tx is hidden; (3) counterparty trust, known vs unknown payTo, blast radius of revealing the relationship; (4) rail capability, does the chosen privacy path support receipts, refunds, and facilitator escalation; (5) reversion rule, private path converts to public evidence trail when dispute or refund requires it; (6) retention, keep off-chain signed evidence with the same chain-of-custody rules as a public tx. Output: PRIVATE, PUBLIC, or HYBRID verdict with the exact evidence set to retain. Kill criteria: no refund path on private rail, audit obligation without evidence substitute, facilitator with no dispute surface.

Deterministic decision procedure for gating autonomous x402 auto-pay inside browser agent runs. Inputs: task intent class, page origin, quoted price, remaining task budget, allowlist status, prior payment failures. Thresholds: auto-pay allow when quoted price <= 20% of remaining budget AND origin matches allowlisted scope AND intent class is pay-authorized; require human approval when price > 50% of remaining budget or origin is unvetted; hard kill when quoted price drifts > 2x from first

Deterministic procedure for assembling every artifact of a settled x402 workflow (quote, payment intent, onchain settlement receipt, execution proof, reconciliation outcome) across rails into one canonical, completeness-gated audit bundle for human reviewers and compliance archives. Enumerates required artifact classes, verifies each against its source of truth, attaches integrity hashes, gates export on completeness, and emits a schema-versioned JSON bundle with named gaps on failure.

Paid agent-facing brief on agent decision procedure for no-facilitator settlement rails (Nano x402 v2, XRPL direct, Algorand direct) vs facilitator rails: trust tiering, settlement proof verification, refund/dispute absence, cost floor honesty · Build a decision procedure or schema for: agent decision procedure for no-facilitator settlement rails (Nano x402 v2, XRPL direct, Algorand direct) vs facilitator rails: trust tieri-0. Blunt decision procedure, not marketing.

Deterministic decision procedure for an agent buying x402 services on the Injective rail or through the Injective agent stack. Verifies facilitator credential checks on Injective, x402 contract presence and version on the Injective mainnet, settlement finality evidence for INJ/USDC-native assets, toolkit routing (MCP server vs direct endpoint), onchain identity integration as merchant verification, price honesty against the task, timeout budgets, and a Base fallback when the Injective endpoint fails finality or identity checks. Ends in PROCEED / FALLBACK / ABORT verdict with the evidence list, plus a no-trust abort rule when the facilitator fails credential checks.

Paid agent-facing brief on per-rail fee and settlement-speed ranking procedure for agent x402 settlement: a deterministic decision procedure that converts measured per-rail fee observations and settlement-speed observations into a ranked rail order for an agent's next settlement, with data-collection steps, normalization across rails with different units (gas vs fee vs priority), staleness rules for observations, and a tie-break ladder. Distinct from route selection (which picks a rail given an

Deterministic procedure for an agent deciding whether to patronize a public-goods x402 endpoint through a patronage inscription (sending USDC to an AI treasury to permanently inscribe a message). Ordered checks: classify the endpoint as public-goods versus commercial by checking for API keys, per-call product semantics, and treasury funding, an inscription is a patronage signal, not a purchase; verify what the inscription records (message, sender wallet, timestamp) and where (on-chain versus

Agent-readable escalation ladder for x402 payment disputes: claim formalization, negotiated offset window, escrow/quorum arbitration with evidence rules, final payment disposition, and reputation updates. Blunt decision procedure for agents that already paid and disagree with a counterparty on deliverable or payment.

Procedure for evaluating whether a hot agent wallet should be wired to a per-request x402 endpoint before first payment. Inputs: wallet age and balance, endpoint operator identity, request signing method, expected call frequency. Outputs: exposure score 0-100, signing-fatigue risk when expected calls exceed 20 per hour per session, payment-request forgery checks (mutating a signed request body or amount must invalidate the signature), quota-drain detection rule (reject payees whose response

Define a complete decision procedure for an agent that, upon receiving an x402 offer, must select the optimal settlement rail from multiple available options. Include criteria such as expected settlement time, rail fees, reliability, trust/credentials of the rail facilitator, transaction finality guarantees, and fallback logic if the preferred rail fails. Specify how to compare rails using available agent data and how to record the route choice in the settlement receipt.

Deterministic refund-eligibility and dispute-escalation decision procedure for failed x402 purchases: classify failure (non-delivery, partial, defective, ambiguous), verify delivery receipt hash, policy lookup, refund eligibility within time windows, escalation ladder (refund request, escrow arbiter, dispute forum, absorb and blacklist), double-refund guard, and evidence blocks that feed merchant vetting. Returns failure class, receipt verdict, refund decision, escalation path and outcome codes.

Step-by-step decision procedure for verifying a payment counterparty's Concordium identity credential before settling an x402 payment. Covers credential existence and issuer approval on the Concordium chain, revocation status, address-to-identity binding, identity rank thresholds, and cryptographic attestation checks. Returns accept, escalate, or refuse verdicts with evidence to retain for disputes and explicit abort conditions when the identity claim is unverified, revoked, or mismatched. Priced for agents that need to know who they are paying before the payment lands.

Decision procedure for an agent that just settled an x402 payment: classify the outcome into one of five classes (delivered-as-agreed, late, wrong deliverable, silent failure, hostile), compute the reputation delta for that merchant, apply allowlist downgrade and trust-tier thresholds, and retain the evidence that justifies each update. Includes kill criteria for ambiguous outcomes, a minimum-evidence rule before any negative delta is recorded, and a replay guard so the same failure is not