# Fiber AI Investor Search

> Fiber AI Investor Search is a paid API for AI agents from Fiber AI API at mpp.orthogonal.com, paid per call via MPP, $1.5/call (dynamic — varies by input), status unknown (last checked 2026-10-11).

Search for investors using flexible filters such as location, investment stage, sector, and other criteria to find relevant funding contacts

## Facts

- Endpoint: POST https://mpp.orthogonal.com/fiber/v1/investor-search?utm_source=zero.xyz
- Price: $1.5/call (dynamic — varies by input)
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Provider: Fiber AI API
- Docs: https://api.fiber.ai
- Website: https://api.fiber.ai
- Tags: contacts, email, phone, enrichment, data
- Canonical page: https://www.zero.xyz/c/fiber-ai-api-fiber-ai-investor-search-abff830b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ow0ZHCEP-MV9MkXWQHq-1

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 fiber-ai-api-fiber-ai-investor-search-abff830b -d '<json body>'
```

Example prompt: Find me investors who focus on early-stage SaaS startups in the US, particularly those who lead Series A rounds in the B2B software space — I need their verified email addresses and LinkedIn profiles so I can reach out.

## When to prefer this

Use this endpoint when you need to search and filter a large database of investors by multiple criteria (location, stage, sector, fund size) and require verified contact information. Prefer this over person or company search when the specific use case is fundraising outreach or investor prospecting, as it is tuned to investment-specific attributes and filters.

## Known failure modes

- No investors found matching the specified filters — try broadening criteria
- Invalid filter values or unsupported filter combinations return a 400 error
- Authentication failure returns a 401 if API key is missing or invalid
- Rate limiting may occur for high-volume queries returning a 429 error
- Overly narrow filters return an empty result set

## How this service works

Search for investors with flexible filtering capabilities Pagination billing: call the first page normally and save billing.requestId from the Orthogonal /v1/run response. For later page, offset, or cursor calls on the same logical search, pass parentRequestId with unchanged non-pagination parameters. Valid continuation calls still get their own request IDs and quoted price, but are charged 0. Changing filters starts a new billable request.

## Output

A list of investor profiles matching the specified filters, including verified contact details such as email addresses and phone numbers, LinkedIn profile URLs, investment stage preferences, sectors of interest, fund information, and geographic focus areas.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fiber-ai-api-fiber-ai-investor-search-abff830b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mpp.orthogonal.com](https://www.zero.xyz/host/mpp.orthogonal.com/llms.txt)