Every agent-payable API.

Look up a static chain id to network name table without live RPC — call when mapping a static chain id to a network name (no tip). 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, web…

Look up known vulnerabilities for a package+version via OSV API. Supports npm, PyPI, Maven, Go, Cargo, NuGet. Returns CVEs with severity and fix versions.

Look up product information by UPC/EAN barcode. Uses Open Food Facts and UPC ItemDB. Returns product name, brand, nutrition, images.

Look up supported blockchain network metadata and chain IDs for $0.001 USDC. Static first-party registry only—no live RPC, balances, blocks, receipts, gas, or contract reads.

Search the federal banking compliance rules database. 56 rules across Reg DD, Reg Z, UDAAP, ECOA, BSA/AML, and more.

Who is this prescriber, and what do they prescribe most in Medicare Part D? Look up a prescriber by NAME (or exact NPI): NPPES identity — specialty, location — plus that NPI's latest-year Part D summary (top drug, total claims, distinct drugs, and which tracked classes GLP-1/SGLT2/DPP-4/Statin they write). Optionally narrow by state and specialty. Observational public CMS/NPPES records — never a clinical recommendation. Cross-gateway via the Healthparse Part D API.

Look up a person and their associated company data in a single request.

Look up a person by name, email, LinkedIn URL, or other identifiers. Returns professional profile and contact information. Consumes 1 export credit.

Lookup country name from a static ISO3166-1 alpha-2 table subset. Call when labeling country codes offline. Returns name and code 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.

Loopable Bazaar category-heat change feed with added, removed, rank-change and price-change records, stable cursors and feed timestamps

Luhn check for digit strings (cards/IDs). Call when you reject obviously invalid card-shaped numbers before payment UI. Returns valid boolean and digit count for $0.001 USDC via x402 on Base. Checksum only—not issuer, funds, or PAN storage. No network, no keys, no retention. Results are advisory; the caller owns budgets, auth, and production controls.

Luhn checksum validation for digit strings 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.

Did the MCP server you approved change since you pinned it? Re-fetches the live tool manifest and returns a signed diff (added/removed/modified tools) against the stored pin. $0.01 USDC per check.

Signed drift history for one MCP server: pins over time, every detected drift event, and a current verdict (stable, changed, or poisoning-suspect). $0.05 USDC per report.

MCP server readiness API for agents: audit tools/list, schemas, manifests, discovery, and integration readiness for $0.01 USDC before publishing or connecting a client.

MCPFax markets crypto

MCPFax markets stablecoin

MCPFax markets — Chain TVL ranking (defi_chains). Price: $0.001 USDC per call on Base.

MCPFax markets — On-chain token prices (defi_token_prices). Price: $0.001 USDC per call on Base.

MCPFax markets — Polymarket markets (polymarket_markets). Price: $0.001 USDC per call on Base.

MD5 hex digest of text. Call when you match legacy content hashes (not for security). Returns hex digest for $0.001 USDC via x402 on Base. Legacy checksum only—not password hashing. No network, no keys, no retention. Results are advisory; the caller owns budgets, auth, and production controls.

Is this Minneapolis Minnesota (Hennepin) rental licensed and code-compliant? GET ?address= (street 1-120 chars). Returns compliance_verdict (licensed_clean|licensed_with_violations|unlicensed|condemned_or_boarded), active rental license status/tier/units/expiration, violation cases, condemned/boarded flag. Live City open data JSON. Jobs: tenant screening, landlord DD, lending. Free sample: /mn/property-check/sample.

Is this Minneapolis rental property licensed and in compliance? Query any street address in Minneapolis, Minnesota (Hennepin County) and get the active rental license -- status, tier, licensed unit count, expiration -- plus violation and code-enforcement case history, and whether the property is condemned or boarded. For tenant screening, landlord and property-manager due diligence, real-estate and lending checks. Input: address string. Output: JSON, live City of Minneapolis open data. (US ne...

MPP-native catalog-first task router: paid top-three shortlist with prices, payment methods, MCP schemas, health metadata and operator source attribution

Get a sourced, versioned medical procedure price corridor with an Ed25519 evidence receipt.

Durable asynchronous GPU-job submission. Settlement means the job was accepted and a job_id was returned; it does not mean the eventual PINN result converged or passed validation.

Reviews Polymathica's governed experiment memory and returns advisory dream candidates, review decisions, and solver/PINN recommendations without running solvers, mutating registries, exposing raw source runs, or applying MEMORY.md changes.

Retrieve a bounded evidence report for a validated Polymathica solver, including validation state/version, implementation source, evidence location, scope summary and registry-snapshot provenance.

Search the full US Treasury OFAC Specially Designated Nationals (SDN) list -- name, sanctions programme, and entity type -- for compliance/denied-party screening. Complete 19,199-entry list, not a bounded sample.

Analyse supplied CFD convergence, continuity, mass-flow and provenance evidence against declared v1 acceptance criteria. Returns calculated measurements, reasons, hashes and limitations; no formal engineering certification.

Aggregate transaction patterns across this marketplace's payment rails -- volume, success rate, and task-state breakdowns by rail and time window. Aggregate only: no individual buyer's wallet address, transaction hash, Lightning node id, or payment record is ever included, by design.

Returns a license-compliance view over the same locally harvested metadata-only index of public scientific assets as the metadata-search listing -- per-asset license state and a summary count by license type. Metadata pointers only -- no underlying datasets, papers, or model weights are downloaded or resold.

Search recent UK public-sector procurement notices from Find a Tender -- buyer, value, CPV category, and status. Published under the Open Government Licence v3.0, confirmed directly from the source's own declared package licence.

Current block number and gas price for Base and Polygon mainnet, fetched live via RPC on every call. Unlike this catalogue's corpus-search listings, this makes a real outbound network call on purchase -- freshness is the product, not a stored snapshot.

Searches a locally harvested metadata-only index of public scientific assets from free/open APIs. Returns curated pointers, licenses, provenance, freshness hashes, and source metadata without downloading or reselling the underlying open datasets, model weights, papers, or repositories.

Search macroeconomic indicator values (GDP, inflation, unemployment, population) across eight major economies and multiple recent years. Published under CC BY 4.0, explicit commercial reuse permitted.

Metadata about the GPU/LLM pricing feed's tracked targets: source URL, last-fetch time, content hash, and parse status per provider. No pricing values themselves -- use the pricing listing for that. No outbound network on purchase; read from the local feed database.

Search a bounded snapshot of NVD (NIST) CVE records merged with the complete CISA Known Exploited Vulnerabilities list -- description, CVSS severity, and whether the CVE is known to be actively exploited in the wild.

Find source-linked scientific software and repositories by topic. Returns metadata, declared licence evidence and provenance pointers without downloading or reselling repository contents.

Search a governed snapshot of implemented, validated Polymathica PDE and scientific-computing solvers. Returns validation versions, bounded evidence locations, implementation modules and provenance without claiming a fresh solver execution.

Retrieve one sanitized archive metadata record by asset id, including content hash, readiness state, field inventory summary and evidence flags.

Returns a graph view (nodes/edges) over the same locally harvested metadata-only index of public scientific assets as the metadata-search listing, linking assets to their sources. Metadata pointers only -- no underlying datasets, papers, or model weights are downloaded or resold.

Per-target pricing change events -- whether the latest scraped snapshot differs from the previous one, with fetch times and content hashes for both. No outbound network on purchase; read from the local feed database populated by the scraper on a 6-hour cadence.

Search a bounded Crossref snapshot for research-paper DOI metadata with stable DOI links, source provenance and conservative linked-work rights fields. Returns metadata only and excludes abstracts and full text.

Find source-linked scientific papers by topic. Returns metadata pointers, authors, dates, licence evidence when supplied by the source, and corpus provenance; it does not sell paper text or infer reuse rights.

Returns reproducible aggregate statistics for the sanitized Polymathica archive census: 77,053 source rows, unique hashes, domains, file types, readiness and quarantine counts.

Real-time GPU and LLM API pricing data scraped from public cloud provider websites. Structured, parsed pricing with per-provider plan details, source URLs, content hashes, and freshness. No outbound network on purchase — data is read from the local feed database populated by the scraper on a 6-hour cadence.

A domain-curated, license-verified metadata pointer index over computational fluid dynamics (CFD) datasets, papers, and code repositories harvested from DataCite, arXiv, CORE, OpenAlex, Zenodo, and GitHub. Every record returned has been confirmed redistribution_allowed at harvest time -- this is the falsifiable guarantee the listing sells, not raw data volume. Metadata pointers only -- no underlying datasets, papers, or code is downloaded or resold.

A domain-curated, license-verified metadata pointer index over physics-informed neural network (PINN) datasets, papers, and models harvested from DataCite, arXiv, CORE, OpenAlex, and Hugging Face. Every record returned has been confirmed redistribution_allowed at harvest time -- this is the falsifiable guarantee the listing sells, not raw data volume. Metadata pointers only -- no underlying datasets, papers, or model weights are downloaded or resold.

Search a bounded snapshot of the UK Companies House register -- company name, number, status, category, registered address, and SIC code. Published under the Open Government Licence v3.0, which explicitly permits commercial reuse.