# Happenstance Person Research

> Happenstance Person Research is a paid API for AI agents from Happenstance at mpp.orthogonal.com, paid per call via MPP, $0.3/call, status unknown (last checked 2026-10-10).

Submits a person research request with a natural-language description and returns a detailed profile including employment, education, projects, writings, and hobbies

## Facts

- Endpoint: POST https://mpp.orthogonal.com/happenstance/v1/research?utm_source=zero.xyz
- Price: $0.3/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Provider: Happenstance
- Docs: https://happenstance.ai/developers
- Website: https://happenstance.ai
- Tags: people, research, enrichment, data
- Canonical page: https://www.zero.xyz/c/happenstance-person-research-ed5271f0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lmqhMDFoUyQFwSuV_B6Ku

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 happenstance-person-research-ed5271f0 -d '<json body>'
```

Example prompt: Can you research Dr. Sarah Chen — she's a machine learning researcher who previously worked at DeepMind and graduated from MIT around 2015, and I'd like a full profile covering her employment history, education, projects, writings, and hobbies?

## When to prefer this

Use this endpoint when you need a comprehensive, multi-faceted profile of a real person and can provide a natural-language description with identifying details. Prefer this over structured lookup APIs when the input is descriptive rather than a precise identifier like an email or LinkedIn URL, and when you need rich output covering career, education, and personal interests rather than just contact data.

## Known failure modes

- Insufficient identifying information in description leads to low-confidence or empty results
- Person is not found in available data sources
- Ambiguous description matches multiple individuals
- Rate limiting or quota exceeded
- Payment of 0.3 USDC not fulfilled, resulting in authorization error

## How this service works

Start a new person research request. Include as many details as possible about the person in the description field (name, company, role, etc.).

## Output

A detailed person profile including employment history, education, projects, writings, hobbies, and an overall summary of the individual based on the submitted description.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/happenstance-person-research-ed5271f0/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)