x402-protocol-integration

Select a reproducible sample without replacement from a bounded caller-supplied list. Use when multiple agents or retries must reach the same selection from the same seed. Returns sampled values, original indices, and a seed hash for 0.001 USDC via x402 on Base; local-only, stateless, and no input retention.

Sum price*size depth notional for a side ladder. Call when risk needs notional available within N levels. Returns depth_notional and levels_used 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.

Validate caller-supplied image delivery metadata before accepting an agent purchase. Checks HTTPS artifact URL, SHA-256 shape, supported MIME type, byte ceiling, and dimension ceilings without fetching or generating media. Returns explicit contract gaps and a normalized receipt for 0.001 USDC via x402 on Base; local-only and safe while generation refunds are pending.

ShieldAPI - x402 security preflight before agents accept or store credential material

ShieldAPI - x402 security preflight before agents accept or store credential material

Classify an HTTP status code into family with retry hint — 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. Sibling of Delx routes that already conver…

Validate a URL/product slug against a safe lowercase hyphen pattern — 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. Sibling of Delx routes that alr…

Classify whether a failed HTTP-style call is safe to auto-retry — 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. Sibling of Delx routes that already…

Monitor ONE x402 endpoint for 30 days and get alerted on changes that break agents: payTo changes (critical — possible takeover/rug), price changes, asset/network changes, 402-spec regressions, delisting, and liveness (down/recovered). Account-free: pay, receive a one-time secret + poll URL. Push to multiple signed HTTPS webhooks and/or Slack/Discord incoming webhooks (up to 5 each per watch). Every push URL is connection-tested before payment — unreachable URLs are rejected with no charge. Edit URLs or cancel early for free via bearer-authed PATCH/DELETE /v1/watch/{id}. Poll the append-only event log; nothing is lost between polls.

ShieldAPI - x402 security preflight before agents install or run npm/PyPI dependencies

ShieldAPI - x402 security preflight before agents install or run npm/PyPI dependencies

X402 Payment Payload Size: X402 Payment Payload Size checks serialized payment payload bytes against a buyer limit from bounded caller-supplied values without an external provider. Call X402 Payment Payload Size 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 Payment Payload Size as versioned deter…

Evaluate simple refund eligibility flags against policy JSON. Call when agents checking refund windows before opening disputes. Returns eligible and reasons 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.

Audit CORS response headers for wildcard, credential, and cache-variance risks. Use it before an autonomous workflow acts on untrusted input, changes an API, retries a request, or evaluates production reliability. Returns bounded machine-readable JSON for $0.002 USDC via x402 on Base. Execution is deterministic, first-party, local-only, stateless, and does not call an upstream provider; structured validation failures are not billed.

Redact common PII candidates before logs, prompts, or downstream tools receive the text. Use it before an autonomous workflow acts on untrusted input, changes an API, retries a request, or evaluates production reliability. Returns bounded machine-readable JSON for $0.002 USDC via x402 on Base. Execution is deterministic, first-party, local-only, stateless, and does not call an upstream provider; structured validation failures are not billed.

Detect likely credentials and private keys without returning their values. Use it before an autonomous workflow acts on untrusted input, changes an API, retries a request, or evaluates production reliability. Returns bounded machine-readable JSON for $0.002 USDC via x402 on Base. Execution is deterministic, first-party, local-only, stateless, and does not call an upstream provider; structured validation failures are not billed.

Summarize log severity and hashed error fingerprints without returning sensitive error lines. Use it before an autonomous workflow acts on untrusted input, changes an API, retries a request, or evaluates production reliability. Returns bounded machine-readable JSON for $0.002 USDC via x402 on Base. Execution is deterministic, first-party, local-only, stateless, and does not call an upstream provider; structured validation failures are not billed.

Turn an OpenAPI document into a compact operation index for planning and tool selection. Use it before an autonomous workflow acts on untrusted input, changes an API, retries a request, or evaluates production reliability. Returns bounded machine-readable JSON for $0.002 USDC via x402 on Base. Execution is deterministic, first-party, local-only, stateless, and does not call an upstream provider; structured validation failures are not billed.

Decide whether an HTTP failure is safe to retry and return an idempotency-aware policy. Use it before an autonomous workflow acts on untrusted input, changes an API, retries a request, or evaluates production reliability. Returns bounded machine-readable JSON for $0.002 USDC via x402 on Base. Execution is deterministic, first-party, local-only, stateless, and does not call an upstream provider; structured validation failures are not billed.

Normalize heterogeneous webhook events and derive a stable payload fingerprint. Use it before an autonomous workflow acts on untrusted input, changes an API, retries a request, or evaluates production reliability. Returns bounded machine-readable JSON for $0.002 USDC via x402 on Base. Execution is deterministic, first-party, local-only, stateless, and does not call an upstream provider; structured validation failures are not billed.

Check a JSON payload against a bounded structural contract and return path-level errors. Use it before an autonomous workflow acts on untrusted input, changes an API, retries a request, or evaluates production reliability. Returns bounded machine-readable JSON for $0.002 USDC via x402 on Base. Execution is deterministic, first-party, local-only, stateless, and does not call an upstream provider; structured validation failures are not billed.

Measure achieved reliability against an SLO target from good and total events. Use it before an autonomous workflow acts on untrusted input, changes an API, retries a request, or evaluates production reliability. Returns bounded machine-readable JSON for $0.002 USDC via x402 on Base. Execution is deterministic, first-party, local-only, stateless, and does not call an upstream provider; structured validation failures are not billed.

Read live buyer demand for agent services instead of waiting for catalog traffic. Returns open RFQs with public task contracts, USDC ceilings, deadlines, acceptance criteria and disclosed first-party origins, optionally filtered by capability family. Bid separately with a wallet signature; this metered x402 call never exposes buyer capabilities, encrypted envelopes, raw wallets or payment proofs and never custodies execution funds.

HTTPBin Test Echo - a Sly-published x402 service running on Sly's gateway (api.getsly.ai). Used to validate the publish + gateway flow end-to-end. Powered by Sly (https://getsly.ai). Buyer agents call this URL with x402 payment and get a JSON slideshow back. Sly Treasury account, Demo Fintech tenant, demo/test slug.