Every agent-payable API.

Lookup a specific IPv4 or IPv6 address. Append the IP to the path, for example /134.201.250.155. Use fields to limit the response to only the metadata an agent needs.

ISBN-10/ISBN-13 checksum validation for $0.001 USDC. Call when you need this bounded result without an API key or subscription. Returns machine-readable JSON via x402 on Base or Solana. Limitation: results cover only the supplied input or one bounded public endpoint at request time; callers must verify before acting.

Convert a date to its ISO 8601 week-date (year, week number, weekday), ordinal day-of-year, quarter, and days remaining in the year.

ISO week number. Call for weekly reporting buckets and standup cadence keys. Returns ISO week number (and year context) for a date. $0.001 USDC per successful call via x402 on Base—deterministic first-party JSON, no API key, no subscription, and nothing is billed on structured validation errors.

IXS Real world asset vaults — 6% yields, BlackRock exposure, tokenized on-chain

Validate an IBAN and check whether a bank account number is valid. Verifies the ISO 13616 MOD-97 checksum, structure and country length against the IBAN registry, and returns validity, the country, the BBAN and a formatted IBAN. Instant, deterministic bank account number validation and verification for any European or international IBAN.

Validate an IBAN offline against the ISO 13616 registry: country and length check, ISO 7064 MOD-97-10 checksum, BBAN extraction, durable audit receipt.

Validate an IBAN and retrieve associated bank details, country, and check digits.

ICD-10-CM search — Search ICD-10-CM diagnosis codes by term or code.

Broad person lookup returning up to 20 candidate matches with confidence scores. Useful when you have partial info and want multiple possible matches.

Identify statistical outlier indexes in bounded numeric samples. Use it as a bounded preflight or analysis step inside an enterprise agent workflow before data, policy, integration, security, or commercial decisions reach production. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, memory-only, and has no paid upstream or input retention. Results are advisory; the caller remains responsible for authorization and produ…

Identify the type and country of a company registration number. Detects Swedish org numbers, Finnish business IDs, German HRB numbers, LEIs, DUNS, and 20+ other formats. Pure algorithmic.

Identify unbounded dependency declarations before an agent installs them. Use it as a bounded preflight or analysis step inside an enterprise agent workflow before data, policy, integration, security, or commercial decisions reach production. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, memory-only, and has no paid upstream or input retention. Results are advisory; the caller remains responsible for authorization…

Correlate an email address against the criminal breach/stealer corpus to surface linked phone numbers, secondary domains, and other identifiers tied to the same compromised identity. Call to map the blast radius of a known compromise across an organization.

Paid machine-readable identity, authorship, provenance, governance, MRD, and Plate architecture graph.

Return a 0-100 domain security score across 6 identity-risk dimensions (breach exposure, infostealer density, ransomware exposure, session exposure, CVE exposure, threat-actor targeting) with a letter grade and plain-English risk factors. Call as a single-number identity health check before onboarding, financing, or partnering with a domain.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Paid x402 endpoint for generating images from text prompts.

Google Images search for AI agents at $0.004 per call, from the same Serper.dev source as /web/search. Send a query, get back compact JSON: top image results with position, title, image URL, source page link and dimensions. Tune with num (1-10 results), country and language (2-letter codes). Zero results is a valid, honest answer. Pay per call in USDC on Base, no account, no API key.

DripMetricsAI (https://dripmetrics.ai/) provides on-demand order-book microstructure metrics computed fresh per request from Binance's public depth snapshot. Agents can pay per request via x402 and receive structured JSON metrics without subscriptions or API keys. Imbalance is (bid volume - ask volume) / (bid volume + ask volume) over the top depthLevels on each side.

Impermanent loss for a 50/50 constant-product LP position vs simply holding, given the price change of the volatile asset.

Impermanent loss % and hold-vs-LP value for a 50/50 pool from the price ratio (new/old) of the volatile asset; nets optional fees earned to show true LP outcome.

Implied spot from future and annualized carry over days. Call when backing out fair spot from futures + carry assumption. Returns implied_spot 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.

Public URL that buffers inbound webhooks until your agent collects them.

Payment security firewall scan for an INCOMING x402 payment request (402 offer): resource URL risk, credential-demand detection, price sanity, replay detection, canonical-USDC asset verification, merchant pinning, and counterparty reputation. Returns allow/flag/block with per-check reasons and an Ed25519-signed verdict. Advisory and non-custodial.

Fetch a live UK Companies House company dossier with registered details, SIC sectors, filings, officers, persons with significant control, founder graph, compliance status, risk flags, and persona-ranked opportunity evidence.

Fetch a compact agent-safe projection generated from live or cached Companies House data: UK incorporation trends, sector and SIC clusters, postcode hotspots, founder/director signals, persona opportunities, and action queues.

Indent every line by N spaces. Call when you format nested blocks for agent prompts or diffs. Returns indented multiline text 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.

Independent audit of a Rubric attestation: signature validity, HCS sequence, and direct Hedera mirror-node confirmation. Returns a signed verdict carrying its own attestation ID — a verification you can cite as evidence.

Independent pre-purchase evidence on AI agents. FREE: check whether a dated complaint has been published about a seller before you pay it, or file your own if you were a party to a settled transaction — agentreputation.dev/complaints. PAID here: one fixed-scope manual brief on one candidate for your mission (facts, contradictions, missing evidence, safeguards, contextual recommendation), delivered within 24h. Payment buys the analysis only, never a rating, ranking or favorable treatment.

Independent parlay probability as product of leg probabilities. Call when rough multi-leg combo probability when assuming independence. Returns combined probability and n legs 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.

Index ABI type frequency for planning encodings without performing eth_call — call when indexing ABI type frequency before encoding. 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…

Index markdown ATX headings from caller-supplied text only — call when indexing ATX headings in caller-supplied markdown. Use on text/URLs the agent already holds—adjacent to high-volume extract demand, never advertised as general web or X search. 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, web search, or media generation.…

Index named GraphQL queries, mutations, and subscriptions. Use it as a bounded preflight or analysis step inside an enterprise agent workflow before data, policy, integration, security, or commercial decisions reach production. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, memory-only, and has no paid upstream or input retention. Results are advisory; the caller remains responsible for authorization and production…

Individual arena strategy signal