x402-protocol-integration

X402 Delivery Latency Check: X402 Delivery Latency Check checks observed delivery latency against a buyer SLA from bounded caller-supplied values without an external provider. Call X402 Delivery Latency Check before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for X402 Delivery Latency Check as versioned determ…

Ensure a string ends with a required suffix without duplication — first-party local utility for agent preflight and proven micro-utils expansion. Returns deterministic machine-readable JSON for $0.001 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, no web search, no live RPC, and no mediagen. Results are advisory; the caller owns authorization, budgets, and production controls.

X402 Settlement Tx Shape: X402 Settlement Tx Shape checks a settlement transaction identifier for expected chain shape from bounded caller-supplied values without an external provider. Call X402 Settlement Tx Shape before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for X402 Settlement Tx Shape as versioned det…

Canonicalize and validate even-length hex strings with optional 0x prefix — call when normalizing even-length hex for chain tooling. Use for chain input hygiene without live RPC—adjacent to OneSource-class small chain reads, but static/local only so rights and margin stay clear. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain tip, w…

Parse IPv4 into octets. Call when you validate IP literals held by agents. Returns valid flag and octets for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Format a fixed UTC offset as ±HH:MM. Call when agents need offset labels without full IANA DB. Returns offset string as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

Compare two caller-supplied HTTP header maps case-insensitively while redacting Authorization, Cookie, Set-Cookie, and Proxy-Authorization values. Use after header or TLS inspection to identify configuration drift and security-sensitive changes. Returns bounded deterministic JSON for 0.001 USDC via x402 on Base or Solana; no URL fetch or retention.

Z-score of spread series for pairs trading. Call when mean-reversion signals from a price-spread series. Returns zscore, mean, stdev as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

Extend an existing x402 network-feed subscription by 30 days using the same feed_handle. Renewing before the expiry date adds to the remaining time instead of restarting it, so polling never has a gap. Your cursor is kept.

The Anthropic Messages wire priced from the request itself: the 402 quotes this exact body, from $0.001, with upto buyers settling actual usage under the quote. Use it when an agent built on the Anthropic SDK, or Claude Code, needs any supported model paid per call with no account.

Detect private/loopback IPv4. Call when you block private egress targets in agent allowlists. Returns valid and private flags for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Return object keys sorted lexicographically for stable hashes — first-party local utility for agent preflight and proven micro-utils expansion. Returns deterministic machine-readable JSON for $0.001 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, no web search, no live RPC, and no mediagen. Results are advisory; the caller owns authorization, budgets, and production controls.

Compare two semver triples (-1,0,1). Call when you decide upgrade direction for agent packages. Returns cmp and ok for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Position size from account risk budget and stop distance. Call when fixed-fractional sizing without a broker SDK. Returns size from risk dollars and stop as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

Volume-weighted average entry across fill price/size pairs. Call when averaging multiple fills into one book cost basis. Returns average entry and total size as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

Browse ERC-8004 registered AI agents on Base. Filter by x402 payment support.

x402 API activity stats — top endpoints by paid calls, trend data, and unique payer counts from memoryapi.org nginx logs.

Trust score (0-100, grade A-F) for any x402 endpoint -- listed in our catalog or not. Unlike uptime-only checkers, we return ECONOMIC PROOF: the REAL on-chain USDC settlement volume and distinct-payer count for the endpoint's payTo address -- is anyone actually paying it, or is it just live? Computed deterministically from continuous monitoring: 30d probe uptime, 402-envelope spec compliance, latency, observed age, on-chain settlement activity, and advertised-price stability. Includes a full component breakdown, machine-readable flags, and an honest observedDays (we report only the history we actually have, with dataCompleteSince marking our gap-free on-chain coverage). Uncataloged endpoints are live-probed on your first query and auto-adopted into the monitored catalog (first-contact score with low confidence -- history accumulates from there). Each paid call also refreshes the endpoint's free public snapshot (page, badge, card), so a fresh score shows everywhere immediately. Know before you pay.

Post a task with a USDC budget and let live x402 services compete for it. Publish a capability family, bounded input/output contracts, acceptance criteria, ceiling and deadline; receive a signed RFQ receipt plus a private claim capability. Sensitive data stays in a client-encrypted envelope Delx never decrypts. Pay once via x402 on Base or Solana, with no account, API key, subscription or execution-fund custody.

Daily cross-asset morning brief — forex + commodities + equities + crypto + macro, closed by an AI strategist synthesis. The only one on x402. Generated daily, served instantly.

Activate an accepted directory listing — one-time x402 listing fee, then your endpoint is live in the curated DE/EU marketplace

Is this x402 endpoint safe to pay? Check it before your AI agent pays: go / caution / no_go, the recommended payment option, and why (payment would fail, over your budget, price above advertised, not HTTPS, unknown token). Never pays the endpoint. Cached 10 min.

Is this x402 endpoint safe to pay? Check it before your AI agent pays: go / caution / no_go, the recommended payment option, and why (payment would fail, over your budget, price above advertised, not HTTPS, unknown token). Never pays the endpoint. Cached 10 min.

List all registered x402 resources for an origin