# Coresignal Employee Post Filter Search

> Coresignal Employee Post Filter Search is a paid API for AI agents from Coresignal at mpp.orthogonal.com, paid per call via MPP, $0.021/call, status unknown (last checked 2026-10-12).

Search for professional network posts (e.g. LinkedIn posts) using filters such as author profile URL or keywords, returning matching post IDs.

## Facts

- Endpoint: POST https://mpp.orthogonal.com/coresignal/v2/employee_post/search/filter?utm_source=zero.xyz
- Price: $0.021/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Provider: Coresignal
- Docs: https://docs.coresignal.com
- Website: https://coresignal.com
- Tags: company, employee, jobs, intelligence, data
- Canonical page: https://www.zero.xyz/c/coresignal-employee-post-filter-search-4285c38e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dgVbXCFYfgeY1Xou49E9d

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 coresignal-employee-post-filter-search-4285c38e -d '<json body>'
```

Example prompt: Can you find recent professional network posts from the author at linkedin.com/in/johndoe that mention 'artificial intelligence' using Coresignal's post filter search?

## When to prefer this

Use this endpoint when you need to search and filter professional network posts by author profile URL or keywords, specifically within Coresignal's 3B+ record database. Prefer this over general web scraping when you need structured, regularly updated post data tied to known employee profiles. Use it as a first step to retrieve post IDs before enriching with full post details.

## Known failure modes

- No posts found matching the given filters — returns empty array
- Invalid author profile URL format — returns 400 Bad Request
- Missing or malformed filter body — returns 400 validation error
- Authentication failure — returns 401 Unauthorized
- Rate limit exceeded — returns 429 Too Many Requests
- Upstream data source unavailable — returns 503 Service Unavailable

## How this service works

Search for professional network posts using filters like author profile URL or keywords. Pass filters in the request body (not a post URL). Returns an array of numeric post IDs (e.g., ["7431869637207928834", ...]). Use these IDs with the 'Employee Posts Collect' endpoint to get full post content.

## Output

An array of numeric Coresignal post IDs matching the specified filters, which can then be used to retrieve full post details from a subsequent enrichment endpoint.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coresignal-employee-post-filter-search-4285c38e/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)