# MathOverflow Question Search

> MathOverflow Question Search is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Search MathOverflow (research-level mathematics Q&A) questions by keyword, ranked by vote count, returning results as JSON.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/mathoverflow-search
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mathoverflow-question-search-2896b0c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5Df1qP6zL99u1EE5vJXBq

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 mathoverflow-question-search-2896b0c5 -d '<json body>'
```

Example prompt: Search MathOverflow for highly voted questions about the Langlands program — I want to see what research mathematicians are asking about it.

## When to prefer this

Use this endpoint when the user needs research-level mathematics questions and answers specifically from MathOverflow, ranked by community votes — not general Stack Overflow programming questions or basic math help from Math Stack Exchange.

## Known failure modes

- Empty results if query matches no MathOverflow questions
- Malformed or missing ?q= parameter returns error or empty response
- Network timeout or upstream MathOverflow API unavailability
- Payment failure if x402 USDC payment is not processed

## How this service works

Search MathOverflow (research math) questions for {q}, ranked by votes. Query: ?q= Returns JSON.

## Output

A JSON array of MathOverflow questions matching the search query, ordered by vote count, including question titles, vote scores, and relevant metadata such as links and tags.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mathoverflow-question-search-2896b0c5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from clonecho.builda.company](https://www.zero.xyz/host/clonecho.builda.company/llms.txt)