OSF marketplace lets agents pay per record in USDC via x402
u/OneFreeMan13 built Open Source Filings (OSF), a pay-per-record data marketplace using the x402 protocol on Base mainnet, where AI agents can purchase verifiable, source-cited records from 37+ public APIs — including SEC EDGAR, NOAA, openFDA, and USGS — for $0.05–$0.50 each in USDC.
Score breakdown
OSF represents a concrete implementation of micropayment-gated, citation-backed data access for AI agents, directly addressing the verifiability gap that arises when agents rely on scraped or RAG-retrieved content from unattributed sources.
- 01OSF pulls from 37+ public government APIs including SEC EDGAR, FRED, NOAA, USGS, openFDA, SAM.gov, USPTO, NVD, and the World Bank.
- 02Every record is stored with its source authority, canonical source URL, and a UTC retrieval timestamp.
- 03Access uses the x402 protocol on Base mainnet — no API key or subscription required.
u/OneFreeMan13 built Open Source Filings (OSF) over several months to solve a specific problem in agentic workflows: when an agent needs a real-world fact — a SEC filing, a CVE, a clinical trial result, a federal award — RAG over scraped web content returns something plausible but not independently verifiable. OSF addresses this by pulling from 37+ documented public APIs (SEC EDGAR, FRED, NOAA, USGS, openFDA, SAM.gov, USPTO, NVD, World Bank, and others) and storing every record alongside its source authority, canonical source URL, and a UTC retrieval timestamp. All data is public-domain or openly licensed — no scraping, no paywalled content.
The payment and access model is built on the x402 protocol running on Base mainnet.
The payment and access model is built on the x402 protocol running on Base mainnet. An agent first makes a free catalog call to discover available records, data types, and per-record prices. When it requests a specific record, the server responds with HTTP 402 Payment Required, including the USDC amount and pay-to address. The agent's x402 client settles the payment via the Coinbase CDP Facilitator and retries the request, receiving the record plus a provenance block containing the source URL — all in one round trip, with no API key or subscription needed. Prices are mostly $0.05–$0.50 per record.
The post is candid about current limitations: OSF just went live and has essentially no real users yet. The author also clarifies that "verifiable" means each record carries its authoritative source URL for independent checking — not that data is cryptographically signed or that hallucination is prevented. An MCP server for direct agent integration is described as in progress. The post is explicitly seeking community feedback on whether the access model and provenance approach are useful, and what additional public data sources would be most valuable.
Key facts
- 01OSF pulls from 37+ public government APIs including SEC EDGAR, FRED, NOAA, USGS, openFDA, SAM.gov, USPTO, NVD, and the World Bank.
- 02Every record is stored with its source authority, canonical source URL, and a UTC retrieval timestamp.
- 03Access uses the x402 protocol on Base mainnet — no API key or subscription required.
- 04Payment flow: a GET request returns HTTP 402 with a USDC amount; an x402 client settles via the Coinbase CDP Facilitator and retries.
- 05Per-record prices are mostly $0.05–$0.50.
- 06OSF is live on the Coinbase CDP Bazaar but currently has essentially no real users.
- 07An MCP server for direct agent integration is in progress.
Topics
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