# Particle Pro – List Congress Member Bills

> Particle Pro – List Congress Member Bills is a paid API for AI agents from api.particle.pro, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns all bills sponsored or cosponsored by a specific U.S. Congress member, identified by member ID.

## Facts

- Endpoint: GET https://api.particle.pro/v1/congress/members/:id/bills
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/particle-pro-list-congress-member-bills-d7b7323e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zz1dyOtfMbdWVX4S-JkCK

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 particle-pro-list-congress-member-bills-d7b7323e
```

Example prompt: Pull up all the bills that Congress member B000575 has sponsored or cosponsored so I can review their legislative record.

## When to prefer this

Use this endpoint when you need a complete legislative history for a specific U.S. Congress member — both bills they introduced and those they cosponsored. Prefer this over general congressional search APIs when you already have a member ID and want their full bill portfolio rather than searching across all members or all bills.

## Known failure modes

- Invalid or unknown member ID returns a 404 or empty result
- Missing member ID path parameter returns a 400 bad request
- API key or payment authentication failure returns 401/402
- Rate limiting or quota exhaustion returns 429
- Network timeout or upstream unavailability returns 503

## How this service works

List member bills. Returns bills sponsored or cosponsored by this congress member.

## Output

A list of bills sponsored or cosponsored by the specified congress member, including bill identifiers, titles, sponsorship type (sponsor vs cosponsor), and related legislative metadata.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/particle-pro-list-congress-member-bills-d7b7323e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.particle.pro](https://www.zero.xyz/host/api.particle.pro/llms.txt)