Fake memberships API

1,457 memberships from the Identity API, a fake user directory API. A person in a group. POST one to add someone (409 if they are in it already); DELETE it to take them out.

Reads with filters, sorting, search and relations; writes that answer like a real server and stay in your session token. Same ids on every build. Free, no key, CORS open.

Connect

List: https://api.sondahub.com/v1/identity/memberships
One record: https://api.sondahub.com/v1/identity/memberships/{id}
OpenAPI 3: https://api.sondahub.com/v1/identity/openapi.json
GraphQL: https://api.sondahub.com/v1/identity/graphql
JSON file: https://api.sondahub.com/data/identity/memberships.json
MCP: https://api.sondahub.com/mcp · list_records

The first three memberships

curl "https://api.sondahub.com/v1/identity/memberships?limit=3"

Sample records

Records 1 to 3 of 1,457, exactly as GET /v1/identity/memberships/{id} answers them. The data file holds all of them.

[
  {
    "id": 1,
    "created_at": "2023-05-26T12:00:00Z",
    "updated_at": "2023-05-26T12:00:00Z",
    "user_id": 1,
    "group_id": 36,
    "role": "owner"
  },
  {
    "id": 2,
    "created_at": "2023-05-26T12:00:00Z",
    "updated_at": "2023-05-26T12:00:00Z",
    "user_id": 1,
    "group_id": 31,
    "role": "member"
  },
  {
    "id": 3,
    "created_at": "2024-08-02T06:56:11Z",
    "updated_at": "2024-08-02T06:56:11Z",
    "user_id": 1,
    "group_id": 30,
    "role": "member"
  }
]

Fields

Field	Type	Notes
`id`read-only	int	Assigned by the server. Seed records keep their ids across restarts; records you create continue after the seed.
`created_at`read-only	datetime	When the record was created (ISO 8601, UTC).
`updated_at`read-only	datetime	When the record last changed.
`user_id`required	int → users
`group_id`required	int → groups
`role`	enum	`member` `owner`

Relations: user → one user through user_id; group → one group through group_id. Use ?expand=user,group to embed them, or the nested routes.

Endpoints

POST refuses a second membership of the same user in the same group (409 already_member), defaults role to member and bumps the group’s member_count; DELETE lowers it.

GET/v1/identity/membershipsA page, with every filter, sort, search, field and expand option.

POST/v1/identity/membershipsCreate one: 201 with the record, its id, a Location header and the session token that keeps it; 422 names each field that is wrong.

GET/v1/identity/memberships/{id}One record, with an ETag; If-None-Match earns a 304.

PATCH/v1/identity/memberships/{id}Change the fields you send.

PUT/v1/identity/memberships/{id}Replace the record; required fields must all be there.

DELETE/v1/identity/memberships/{id}Answers 200 with what was removed (a real server’s 204 lives at /v1/utils/status/204); gone for the session.

GET/v1/identity/memberships/{id}/userThe user this record points at.

GET/v1/identity/memberships/{id}/groupThe group this record points at.

Try it

List with a filter

curl "https://api.sondahub.com/v1/identity/memberships?role=owner&expand=user&limit=3"

One record

curl https://api.sondahub.com/v1/identity/memberships/1?expand=user

Create

curl -i -X POST https://api.sondahub.com/v1/identity/memberships \
  -H "Content-Type: application/json" \
  -d '{"user_id":1,"group_id":1,"role":"member"}'

Read it back: newest first (send the session token)

curl "https://api.sondahub.com/v1/identity/memberships?sort=-id&limit=3" \
  -H "X-Sondahub-Session: THE_TOKEN_FROM_THE_CREATE"

Change one field

curl -X PATCH https://api.sondahub.com/v1/identity/memberships/1 \
  -H "Content-Type: application/json" \
  -d '{"role":"owner"}'

Delete the one you created

curl -X DELETE https://api.sondahub.com/v1/identity/memberships/1458 \
  -H "X-Sondahub-Session: THE_TOKEN_FROM_THE_CREATE"

Query recipes

Every list option works on memberships; these are ready to paste. All the options.

What	Request
Page 2, 50 at a time (of 1,457)	/v1/identity/memberships?page=2&limit=50
Only role = member	/v1/identity/memberships?role=member
Newest first by created at	/v1/identity/memberships?sort=-created_at&limit=5
Only some fields	/v1/identity/memberships?fields=id,user_id&limit=5
Embed the user	/v1/identity/memberships/1?expand=user
Just the count	/v1/identity/memberships?limit=1&fields=id

GraphQL

The same memberships as the memberships query on https://api.sondahub.com/v1/identity/graphql, and one membership as membership(id: 1). Introspection is on. More on the GraphQL API.

{
  memberships(limit: 3, sort: "-id", filter: { role: member }) {
    total
    data {
      id user_id group_id role
      user { user_name }
    }
  }
}

Run it

curl https://api.sondahub.com/v1/identity/graphql -H "Content-Type: application/json" -d '{"query": "{ memberships(limit: 3, sort: \"-id\", filter: { role: member }) { total data { id user_id group_id role user { user_name } } } }"}'

From an AI agent (MCP)

The MCP server reaches the same rows with list_records, get_record, create_record, update_record and delete_record, and as the resource sondahub://identity/memberships.

tools/call

curl https://api.sondahub.com/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"list_records","arguments":{"api":"identity","collection":"memberships","filters":{"role":"member"},"limit":3}}}'

More in the Identity API

users (300) · groups (40)

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