canonical: https://jentic.com/apis/parliament.uk/members

# UK Parliament Members API

Jentic publishes the only agent-ready OpenAPI specification for the UK Parliament Members API, keeping it validated and up to date. The Members API exposes comprehensive data about UK Members of Parliament and Members of the House of Lords, including biographical information, party affiliations, constituencies, voting records, committee memberships, declared interests, and historical parliamentary roles. It powers research platforms, civic tech applications, and political data analysis across current and historical parliamentary sessions.

## For AI agents

Query UK MPs and Lords by name, constituency, or party; retrieve voting records, committee memberships, interests, and biographical data across 43 endpoints.

## Scope

Covers member biographical data, constituencies, voting, and interests. Does not include bill text, Hansard transcripts, or detailed debate proceedings - use Bills, Hansard, or Commons/Lords Votes APIs for those.

## Capabilities

- Search for constituencies by name or location type
- Retrieve constituency details including election results and geometry
- Look up Members of Parliament by ID, name, or constituency
- Get biographical information and party affiliations for MPs and Lords
- Retrieve voting history and attendance records for individual members
- List committee memberships and roles for current and historical sessions
- Access declared interests from the Lords and Commons registers
- Search for members by party, house, or current status
- Get constituency representations and synopsis data
- Retrieve contact details and parliamentary office information

## Use cases

### Constituency Lookup and Representation

Find MPs representing specific geographic areas by searching constituencies by name or location type. GET `/api/Location/Constituency/Search` returns matching constituencies, then GET `/api/Location/Constituency/{id}/Representations` returns current and historical representatives. The API includes constituency boundaries via /Geometry endpoints for mapping applications.

Example prompt: GET `/api/Location/Constituency/Search`?searchText={area}, then GET `/api/Location/Constituency/{id}/Representations` to list MPs

### Member Biography and Political Profile

Retrieve comprehensive biographical data, party affiliations, and parliamentary roles for MPs and Lords. Search by name via `/api/Members/Search`, then GET `/api/Members/{id}` returns full member details including house, party, constituency, and appointment dates. Cross-reference with `/api/Members/{id}/Biography` for extended background.

Example prompt: GET `/api/Members/Search`?Name={name}, then GET `/api/Members/{id}` and `/api/Members/{id}/Biography` for full profile

### Voting Records and Parliamentary Activity

Access voting history, attendance, and parliamentary activity for individual members. The Voting endpoints return division lists and member vote records, while committee endpoints expose membership and roles across parliamentary committees and all-party parliamentary groups (APPGs).

Example prompt: GET `/api/Members/{id}/Voting` to retrieve voting history, GET `/api/Members/{id}/RegisteredInterests` for declared interests

### AI-Powered Parliamentary Research via Jentic

An AI agent researching UK politics can search for members by party or constituency, retrieve voting patterns, cross-reference committee memberships, and pull declared interests through Jentic without managing pagination or session handling. Jentic resolves intents like 'find all Labour MPs' or 'get voting record for member X' to the correct Members API endpoints.

Example prompt: Search Jentic for 'find MPs by party', load GET `/api/Members/Search` schema with party filter, and execute

## Key endpoints

| Method | Path | Description |
| --- | --- | --- |
| GET | `/api/Members/Search` | Search for members by name, party, or house |
| GET | `/api/Members/{id}` | Retrieve detailed member information by ID |
| GET | `/api/Location/Constituency/Search` | Search constituencies by name |
| GET | `/api/Location/Constituency/{id}/Representations` | Get MPs representing a constituency |
| GET | `/api/Location/Constituency/{id}/ElectionResults` | Retrieve election results for a constituency |
| GET | `/api/Members/{id}/Biography` | Get extended biographical information |
| GET | `/api/LordsInterests/Register` | Access Lords register of interests |

## Key resources

- **Members** — MPs and Lords biographical data, party affiliations, and parliamentary roles
- **Constituencies** — Geographic constituency data including election results and boundaries
- **Voting** — Division voting records and member vote history
- **Committees** — Committee memberships and roles across parliamentary committees
- **Interests** — Declared interests from Commons and Lords registers
- **Elections** — Historical and current election results by constituency

## Why Jentic

- **Setup:** Wiring the UK Parliament Members API by hand means pointing a client at its public host, shaping the member, constituency, and interests routes, and handling pagination and error states yourself. Through Jentic you install once, import the Members API from the API Directory, and your agent calls it with no credential to manage.
- **Permission scoping:** The Members API puts the member and constituency id in the URL path (`/api/Members/{id}`, `/api/Location/Constituency/{id}/...`), so a rule can pin your agent to one member or constituency or to the read-only lookups. Since this public API only reads member data, the agent stays limited to retrieval.
- **Credential handling:** The Members API is open-access, so there is no credential to store; Jentic shapes the request and parses the response at execution time. No token ever enters the agent's prompt, logs, or context.
- **Discovery method:** Agents search Jentic by intent such as 'find the MP for Bristol' or 'get the voting record for a member', and Jentic returns the matching Members operation with its input schema so the agent calls the right endpoint without browsing the reference docs.

## Related APIs

- **UK Parliament Bills API** — Legislative bills and amendments tracking across parliamentary sessions
- **UK Parliament Commons Votes API** — Detailed Commons division voting data with member-level vote records
- **UK Parliament Written Questions API** — Parliamentary written questions and ministerial answers

## FAQ

### Is the UK Parliament Members API free to use?

Yes. The UK Parliament Members API is a public API with no authentication required and no rate limits published. It is maintained by UK Parliament's software engineering team and provides open access to parliamentary member data.

### Can I get voting records for individual MPs?

Yes. Use GET `/api/Members/{id}/Voting` to retrieve voting history for a specific member, or search divisions to see how members voted on particular bills and motions. The API returns structured division voting data.

### How do I find the MP for a specific constituency?

Use GET `/api/Location/Constituency/Search` with the constituency name to get the constituency ID, then GET `/api/Location/Constituency/{id}/Representations` to retrieve current and historical MPs representing that area.

### Does this API include historical member data?

Yes. The Members API includes historical parliamentary data across sessions, including former MPs, previous party affiliations, and historical committee memberships. Filter by date ranges or session to access historical records.

### Where does Jentic's OpenAPI spec for the Members API come from?

Jentic imports and validates the official Swagger spec published by UK Parliament at https://members-api.parliament.uk/swagger/v1/swagger.json, converts it to OpenAPI 3.0.3, and keeps it updated so AI agents and developers can call the API via structured tooling.

### Can I search for members by party affiliation?

Yes. Use the GET `/api/Members/Search` endpoint with party filter parameters to retrieve all MPs and Lords from a specific political party. The API supports filtering by house, party, membership status, and name.

### Can I limit what my agent is allowed to do with the UK Parliament Members API?

Yes. Because you run Jentic One self-hosted, your own rules decide which Members API operations your agent may call, so you can allow only read lookups such as GET `/api/Members/Search` and GET `/api/Members/{id}` and block anything else. Since the member and constituency id sit in the URL path (`/api/Members/{id}`, `/api/Location/Constituency/{id}/Representations`), a rule can pin the agent to a single member or constituency. This API is read-only and needs no credential, so the agent stays limited to retrieving member, constituency, voting, and interests data and can never modify it.