# OSF Open Source Filings — SEC Filings Search

> OSF Open Source Filings — SEC Filings Search is a paid API for AI agents from api.osf-master-server.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Search SEC filings by company name, ticker, CIK, fund manager, or keyword and receive provenance-stamped matching records via x402 micropayment

## Facts

- Endpoint: GET https://api.osf-master-server.com/x402/sec/filings/%7Bquery%7D
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/osf-open-source-filings-sec-filings-search-80496b58
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ix8GlXVSpMrb46zms_y_P

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability osf-open-source-filings-sec-filings-search-80496b58
```

Example prompt: Search OSF's SEC filings for all 13F holdings filings from Berkshire Hathaway and show me the most recent matches with their filing dates.

## When to prefer this

Choose this endpoint when you need verifiable, provenance-stamped SEC filing records retrieved directly from government source data, especially when auditability or citation of the original filing matters. Prefer this over generic web search or scraping when you need structured filing metadata (form type, CIK, filing date) and need to pay per record rather than subscribe. Ideal for autonomous agents that need on-demand financial compliance data without a bulk data subscription.

## Known failure modes

- No matching filings found for the query — returns empty matches array
- Invalid or unrecognized query keyword — may return zero results
- Payment failure via x402 micropayment — endpoint returns 402 Payment Required if USDC payment is not processed
- Rate limiting or quota exceeded — endpoint may reject requests beyond usage thresholds
- Malformed path parameter — missing or improperly encoded query string causes request failure

## How this service works

OSF is a live marketplace of provenance stamped public domain government and scientific data, built for autonomous agents that pay per record over x402 micropayments on Base. A paid MCP server in the official MCP Registry, discoverable on the Coinbase CDP Bazaar.

## Output

Returns a JSON object with a result status (e.g. MATCHES_FOUND), an array of matching filing records each containing source dataset, form type, record ID, filing date, and company or filer name, plus a total match count. Records are provenance-stamped with a traceable source back to the original government data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "query"
     ],
     "properties": {
      "query": {
       "type": "string",
       "description": "Keyword(s): company, ticker, CIK, fund manager, or subject. E.g. 'Berkshire 13F' or 'material weakness'."
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": "MATCHES_FOUND",
  "matches": [
   {
    "source": "SEC_13F_HOLDINGS",
    "form_type": "13F-HR",
    "record_id": 12345,
    "filing_date": "2026-05-15",
    "company_or_filer": "BERKSHIRE HATHAWAY INC"
   }
  ],
  "match_count": 2
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/osf-open-source-filings-sec-filings-search-80496b58/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.osf-master-server.com](https://www.zero.xyz/host/api.osf-master-server.com/llms.txt)