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US Federal Bill Legislative Timeline
x402
US Federal Bill Legislative Timeline is a paid API for AI agents from api.agentstools.dev, paid per call via x402, $0.015/call, status unknown (last checked 2026-09-15).
Returns the lifecycle stages a US federal bill reached (introduced, committee, passed, enacted) within a given date window, with dates and source actions from Congress.gov
Price / call$0.015
Success—
StatusUnknown
How this service works
Stateless event diff for a US federal bill: which lifecycle stages it reached over a date window (introduced, committee, passed, enacted), each with date and source action. Source: Congress.gov, public-domain.
Output
A stateless event diff listing each lifecycle stage the bill reached (e.g. introduced, referred to committee, passed House, enacted), each annotated with its date and the source action text from Congress.gov, filtered to the requested date window.
Example use cases
Example prompt
“What lifecycle stages has HR 3076 from the 118th Congress reached? Show me all events since January 1, 2024.”
Technical details
Endpoint
GEThttps://api.agentstools.dev/legislative/timelineWhen to prefer
Use this endpoint when you need a structured, cited diff of a US federal bill's legislative milestones — especially for change detection over a date window (e.g. 'what happened in the last N days?'). Prefer over general legislative search APIs when you already know the bill ID and need stage-level granularity with source citations rather than full bill text or vote details.
Side effects
- Invalid bill_id format returns 400 with validation error
- Unknown bill or congress number returns 404 or empty event list
- Missing required bill identifier (no bill_id and no billType+billNumber+congress) returns 400
- Invalid ISO date for 'since' parameter returns 400
- Congress.gov upstream unavailability may return 503 or timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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