# Receipts Index – Founding Partner Feed

> Receipts Index – Founding Partner Feed is a paid API for AI agents from api.receiptsindex.com, paid per call via x402, $200/call, status unknown (last checked 2026-10-31).

Returns a dated CSV feed of which US local businesses AI engines name in response to fixed buyer prompts, covering engine, prompt variant, competitors mentioned, and sources cited.

## Facts

- Endpoint: GET https://api.receiptsindex.com/v1/feed/founding-partner?utm_source=zero.xyz
- Price: $200/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/receipts-index-founding-partner-feed-d4c68f43
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NRByMY7HR7nEXWULGbf6v

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 receipts-index-founding-partner-feed-d4c68f43
```

Example prompt: Pull the Receipts Index founding partner feed and show me which businesses Grok and ChatGPT are naming for AI visibility services in the US — include who's getting mentioned, what competitors they name, and whether my business Namebeam appears in any runs.

## When to prefer this

Use this endpoint when you need structured, dated, longitudinal records of AI engine brand recommendations for US local businesses — especially for competitive intelligence, AI visibility auditing, or benchmarking whether a specific business is being named by engines like Grok or ChatGPT for buyer-intent queries. Prefer it over general web search or social listening tools when you specifically need prompt-reproducible, run-tagged AI engine output data.

## Known failure modes

- Payment not completed via x402 returns 402 with payment details
- Invalid or missing founding-partner path segment returns 404
- Malformed properties query parameter returns 400
- No new data rows available for requested period returns empty CSV
- Rate limiting on repeated rapid calls returns 429

## How this service works

Dated rows of which US local businesses AI engines name for fixed buyer questions. Free index and sample; paid rows over x402. Remote MCP at /mcp.

## Output

A CSV-formatted feed with dated rows, each containing a check ID, business name, niche, market (US), AI engine used, prompt variant text, run number, whether the target business was mentioned, names of competitors cited, sources referenced, run channel, and data quality flags.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "text",
 "format": "csv",
 "example": "date_utc,check_id,business,niche,market,engine,prompt_variant,run,business_mentioned,competitors_named,sources_cited,run_channel,flags\n2026-09-01,NB-CZ-GROK-1,Namebeam,AI visibility,US,grok,Who is the best AI visibility service that checks whether ChatGPT recommends my business?,1,false,Profound; Otterly.ai; Peec AI; Semrush AI Toolkit; Ahrefs Brand Radar; Scrunch,Aboutmartech,grok_web_fast,clean\n2026-09-01,NB-CZ-GROK-2,Namebeam,AI visibility,US,grok,\"Which company publishes its own AI-visibility results, wins and losses, with dated transcripts?\",1,false,none named; Brandlight referenced as adjacent,Sat.brandlight,grok_web_fast,clean"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/receipts-index-founding-partner-feed-d4c68f43/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.receiptsindex.com](https://www.zero.xyz/host/api.receiptsindex.com/llms.txt)