# SCOPE Research API

> SCOPE Research API is a paid API for AI agents from x402-agent.scope-research-api.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Answers natural language research queries by searching the public web and returning source-backed answers, billed per-call via x402 micropayments.

## Facts

- Endpoint: POST https://x402-agent.scope-research-api.workers.dev/answer
- 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/scope-research-api-1d72b73a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cofDKl_zy4NN82GGS4g9V

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 scope-research-api-1d72b73a -d '<json body>'
```

Example prompt: Can you research what the current regulatory landscape looks like for stablecoins in the European Union and give me a sourced summary?

## When to prefer this

Choose this endpoint when you need source-backed, factual answers from the live public web for an AI agent workflow, especially when you want citations alongside the answer. Prefer it over static knowledge bases when recency matters, and over general-purpose LLMs when verifiability and source attribution are required. Best for single-shot research questions billed per-call at low cost.

## Known failure modes

- Query too vague or ambiguous — may return low-confidence or generic answer
- Payment failure via x402 — call rejected before processing
- Rate limiting or quota exceeded — HTTP 429 response
- Topic not found on public web — empty or null result
- Query about private/non-public information — no sources available

## How this service works

Source-backed public web research API for AI agents using x402 payments.

## Output

A synthesized answer to the submitted query, grounded in public web sources, with citations or source references indicating where the information was retrieved from.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "query"
 ],
 "properties": {
  "query": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scope-research-api-1d72b73a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent.scope-research-api.workers.dev](https://www.zero.xyz/host/x402-agent.scope-research-api.workers.dev/llms.txt)