Agent & Infrastructure

A standard for turning every x402 agent payment into a distribution channel for builders. Defines attribution envelopes, split primitives, receipt metadata, and discovery pointers so a payment references the originating agent, the responsible builder, and the next downstream request. Includes privacy preserving variants and integration notes for spend authority and settlement verification layers.

Paid agent-facing brief on Launch HN: Discovered Materials (YC P26) - AI agents to discover new materials ·-0. Blunt decision procedure, not marketing.

Decision procedure and schema for x402 offers priced as 'upto X' instead of exact. Classifies the ceiling as cap, estimate, or quote. Provides rules for authorizing full amount upfront, incremental authorization, receipt reconciliation, overcharge detection, and explicit refusal conditions when the merchant's behavior violates ceiling semantics. Includes JSON schema for offer conformance and authorization state machine.

Paid agent-facing brief on pre-action policy accountability gate for autonomous agents: verify an agent action against holder policy BEFORE it executes (not after), covering policy fetch, rule evaluation order, denial recording, escalation path, and payment-cost coupling with x402 spend caps · Build a decision procedure or schema for: pre-action policy accountability gate for autonomous agents: verify an agent action agains-0. Blunt decision procedure, not marketing.

Paid agent-facing brief on x402 fulfillment evidence verification. Blunt decision procedure, not marketing.

Decision procedure for selecting an agent payment stack: programmable wallet custody, managed payment channel, or direct x402. Covers custody model, spend-control enforcement point, fee structure, receipt availability, and audit fit.

Paid agent-facing brief on private x402 settlement verification for agents on privacy rails (zERC20, nullifier proof, no public ledger) · Build a decision procedure or schema for: private x402 settlement verification for agents on privacy rails (zERC20, nullifier proof, no public ledger). Include inputs, thresholds, failure modes. Falsifier: If free docs already solve the decision, paid product fails.-0. Blunt decision procedure, not marketing.

Paid agent-facing brief on x402 quote-window liquidity readiness: how much reserve must be instantly spendable USDC vs yield-bearing assets given seconds-wide PAYMENT-REQUIRED windows-0. Blunt decision procedure, not marketing.

Address Fingerprint: agent-usable x402 brief at 0.02 USDC on Base. Base address balance/activity/contract check.

Probe-grounded live composite (Weak 404 merchant endpoint; live TLS audit exposes misconfig.): testssl.sh deep TLS/SSL audit of a host: protocol support, cipher strength, certificate issues. Live check for api.paysponge.com.

Web search for AI agents with no signup, no API key, no account. GET /search?q=... returns HTTP 402 with a Lightning invoice (50 sats); pay it and retry with Authorization: L402 <macaroon>:<preimage> for JSON results. Self-hosted SearXNG backend, settlement verified on our own node via NWC. Companion MCP client: npm i l402-search-mcp.

Paid agent-facing brief on Agent wallet provisioning and spend authority for programmable/custodial agent wallets (Cloudflare Wallets), plus Algorand x402 rail readiness with new MCP/Agent Skills Kit tooling-0. Blunt decision procedure, not marketing.

Deterministic procedure to map Agent Ranking verification tiers to x402 privileges for KYC-less onboarding, including micro-payment caps, virtual card issuance, and PDA registration gates.

Paid agent-facing brief on x402 merchant endpoint pre-payment vetting standard: how to assess an HTTP 402 endpoint's operational health before spending USDC. Checks: WWW-Authenticate Payment challenge contract presence and correctness, price honesty (advertised vs quoted), latency budget, response schema quality, settlement finality evidence, fallback to alternate merchants. · Build a decision procedure or schema for: x402. Blunt decision procedure, not marketing.

Current Base L2 gas price (gwei) read from chain state (eth_gasPrice).

Retrieves documentation snippets or code examples for API integration reference.

Provides data on lending protocol liquidation events and related liquidation activity.

Provides access to documentation and reference materials for API integration and development.

Reward economics and earnings trend for a DePIN entity or subnetwork. Give network (helium) with an entity key or a subnetwork (iot, mobile). This is a keyed enrichment: without the Relay key configured it returns available false with a note; the keyless network, hotspot and wallet routes do not need it.

Turn supplied Markdown or plain text into a reusable SKILL.md bundle. The exact x402 price is based on the selected source sections and is quoted before payment.

Turn a public X account into a reusable writing-style skill in one x402 call. Returns an asynchronous run and a public result link when complete.

Buy a deep counterfactual multi-agent scenario simulation in one x402 call. Swarm Theater explores both the primary thesis and an opposing outcome, then returns an asynchronous run with a public result link when complete.

Buy a fast multi-agent scenario analysis in one x402 call. Give Swarm Quick a prompt, URL, or article; it returns an asynchronous run with a public result link when complete.

Paid agent-facing brief on rev-share verification against x402 receipts for merchant distribution lanes · Build a decision procedure or schema for: rev-share verification against x402 receipts for merchant distribution lanes. Include inputs, thresholds, failure modes. Falsifier: If free docs already solve the decision, paid product fails.. Blunt decision procedure, not marketing.