# Open Source Filings – Hugging Face Model Search

> Open Source Filings – Hugging Face Model Search is a paid API for AI agents from api.osf-master-server.com, paid per call via x402, $0.05/call, status down (last checked 2026-09-16).

Search AI and machine learning models on the Hugging Face Hub by keyword, returning model metadata including author, task, library, license, downloads, and likes.

## Facts

- Endpoint: GET https://api.osf-master-server.com/x402/models/search/:query
- Price: $0.05/call
- Payment: x402
- Status: down
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/open-source-filings-hugging-face-model-search-a16f9f18
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kQ1_zZj15COdoyGuvIGfx

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 open-source-filings-hugging-face-model-search-a16f9f18
```

Example prompt: Can you search Hugging Face for image segmentation models published by Meta and show me their licenses, download counts, and task pipelines?

## When to prefer this

Choose this endpoint when you need to discover, screen, or compare AI/ML models from the Hugging Face Hub by name, author, task, library, or license — especially for license compliance checks, dependency audits, or tracking which models a specific organization publishes. It is preferable to raw Hugging Face API calls when provenance stamping and structured metadata per model are required by an autonomous agent workflow.

## Known failure modes

- No results returned for very specific or misspelled queries
- Query matches too many generic models, making it hard to filter
- Model metadata may be stale if Hugging Face Hub was not recently crawled
- Payment failure or insufficient USDC balance blocks the call
- Malformed or missing query path parameter returns an error

## How this service works

Search AI and machine learning models on the Hugging Face Hub by name, author or organization, task, library, or license. Returns model id, author, task pipeline, library, declared license, download and like counts, tags and a provenance URL per match. For model selection, license screening, dependency review, and tracking which models an organization publishes.

## Output

Returns a list of matching Hugging Face models, each with its model ID, author or organization, task pipeline type, library, declared license, download and like counts, tags, and a provenance URL linking back to the model's Hugging Face page.

## 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): model name, author or org, task, library, or license. E.g. 'image segmentation' or 'nvidia'."
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/open-source-filings-hugging-face-model-search-a16f9f18/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)