OSF is a live marketplace of public domain government and scientific data: collected from primary sources, stamped with provenance, and sold to autonomous agents that pay per record over x402 micropayments on Base. Available as a paid MCP server in the official MCP Registry and over plain HTTP, discoverable on the Coinbase CDP Bazaar.
A new class of autonomous software — research agents, trading bots, compliance screeners, monitoring systems — needs facts it can cite, not text it has to guess at. The open data exists, scattered across hundreds of government and scientific APIs in incompatible formats. OSF does the unglamorous work: it collects that data, normalizes it onto one schema, attaches an unbroken trail back to the primary source, and makes it purchasable one record at a time by any agent that speaks x402.
Every record links back to the exact filing, dataset, or API response it came from, so an agent can independently verify each fact against its authoritative source. The verifiable trail, not just the data, is what it pays for.
Deterministic per call pricing from one cent. No subscriptions, no API keys, no human in the loop: settlement an agent can decide on and execute entirely on its own.
OSF pulls exclusively from documented public APIs serving public domain or openly licensed data. No scraping, no paywalled content, no terms of service grey areas.
Not samples. Full corpora, loaded from the primary source and refreshed on daily missions.
An orchestrator commands a fleet of stateless collector nodes. Each runs deterministic fetch routines against documented public APIs, stamps every record with its origin, and streams it into a central warehouse, which is then served through a paid MCP server and an x402 settled HTTP endpoint on Base mainnet.
Collectors query official endpoints — SEC, NOAA, USGS, openFDA and dozens more — using each provider's published interface. No browsers, no proxies, no captchas.
Each record is wrapped with its source authority, the canonical filing or index URL, the API call that produced it, and a UTC retrieval timestamp.
Records land in a hash deduplicated PostgreSQL warehouse and are assigned a deterministic price by data type. No model, no guesswork.
A free catalog is open to all; records and searches unlock on a verified USDC payment over Base, settled through the Coinbase CDP Facilitator, over MCP or HTTP.
x402 turns HTTP's oldest status code into a payment rail. Watch the loop: the agent asks, OSF quotes, the agent pays in USDC, the record arrives with provenance attached.
any wallet holder
exact USDC price
record + provenance
The agent calls a priced endpoint. OSF answers 402 Payment Required with an exact quote.
The agent signs a USDC payment for that amount on Base mainnet. No signup, no key exchange.
The retry carries the payment header. The Coinbase CDP Facilitator verifies and settles on chain.
The response body is the record: data, source authority, canonical URL, retrieval timestamp. Citable forever.
Every product is a live endpoint today, over HTTP and MCP alike. Searches return scored matches with full summaries; the catalog itself is free to browse.
One name against eleven authorities: OFAC, UN, EU, UK, FBI, World Bank, HHS OIG, SAM exclusions, Federal Reserve enforcement and more. 280,000+ parties, aliases included, full audit receipt.
Is this CVE being exploited in the wild right now? NVD, the CVE Program, ENISA EUVD and CISA KEV in one verdict with CVSS scores.
1.5 million+ federal court opinions: SCOTUS all time plus all 13 appellate circuits, with SEC litigation and administrative proceedings.
EDGAR filings, 13F holdings, insider transactions, enforcement. Records from one cent each.
1.2 million+ scholarly works: arXiv all categories, PubMed, Crossref, OpenAlex, Semantic Scholar, ClinicalTrials.gov.
Full NVD corpus since 1988, CVE JSON 5, KEV, 3,900+ CISA ICS advisories, CWE, ATT&CK.
Provider registries, drug concepts, clinical trials, and FDA drug and device recalls with full history to 2004.
CPSC, NHTSA and FDA recalls and enforcement, including food recalls back to 2012.
Federal awards, contract opportunities, FEC campaign finance.
eCFR, Federal Register, congressional legislation, Regulations.gov dockets, GovInfo.
FRED, BLS, BEA, Census, FDIC, USDA series, each a citable point in time snapshot.
EPA, NOAA and USGS environmental and hazard records.
Company and entity resolution across SEC, GLEIF LEI and sanctions data.
Browse everything OSF serves, with schemas and prices, before spending a cent.
Any individual record by id, deterministically priced by data type.
Published in the official Model Context Protocol Registry. Cataloged in the Coinbase CDP Bazaar. Indexed by x402 explorers. You do not have to take our word for any of it: every listing is public, and you can query each one yourself.
# the MCP Registry listing curl "https://registry.modelcontextprotocol.io\ /v0.1/servers?search=osf-data-marketplace" # the CDP Bazaar listing for our pay to address curl "https://api.cdp.coinbase.com/platform/v2\ /x402/discovery/resources" | grep -i osf # the live machine readable manifest curl https://api.osf-master-server.com/.well-known/x402 # the agent card curl https://api.osf-master-server.com/.well-known/agent-card.json
The catalog is free to explore with no wallet at all. Paid calls need nothing but USDC on Base.
$ claude mcp add --transport http osf \
https://api.osf-master-server.com/mcp
# then, inside any session:
> use the osf get_catalog tool
{
"mcpServers": {
"osf": {
"type": "streamable-http",
"url": "https://api.osf-master-server.com/mcp"
}
}
}
# discover everything, free: $ curl https://api.osf-master-server.com/.well-known/x402 # any priced endpoint returns a 402 quote; # pay it with any x402 client library: $ curl https://api.osf-master-server.com/x402/screen/sanctions/acme%20corp
Point it at OSF. It can discover the catalog, quote a price, pay, and verify, all without a human in the loop.