HTTP Methods

This file covers deprecated v1 HTTP API. All the methods of v2 HTTP API is described in OpenAPI/Swagger spec and can be viewed by importing https://raw.githubusercontent.com/cayleygraph/cayley/master/docs/api/swagger.yml URL into Swagger Editor or Swagger UI demo.

Gephi

Cayley supports streaming to Gephi via GraphStream.

API v1

Unless otherwise noted, all URIs take a POST command.

Queries and Results

/api/v1/query/gizmo

POST Body: Javascript source code of the query

Response: JSON results, depending on the query.

/api/v1/query/graphql

POST Body: GraphQL query

Response: JSON results, depending on the query.

/api/v1/query/mql

POST Body: JSON MQL query

Response: JSON results, with a query wrapper:

{
    "result": <JSON Result set>
}

If the JSON is invalid or an error occurs:

{
    "error": "Error message"
}

Query Shapes

Result form:

{
    "nodes": [{
        "id" : integer,
        "tags": ["list of tags from the query"],
        "values": ["known values from the query"],
        "is_link_node": bool,  // Does the node represent the link or the node (the oval shapes)
        "is_fixed": bool  // Is the node a fixed starting point of the query
    }],

    "links": [{
        "source": integer,  // Node ID
        "target": integer,  // Node ID
        "link_node": integer  // Node ID
    }]
}

/api/v1/shape/gizmo

POST Body: Javascript source code of the query

Response: JSON description of the last query executed.

/api/v1/shape/mql

POST Body: JSON MQL query

Response: JSON description of the query.

Write commands

Responses come in the form

200 Success:

{
    "result": "Success message."
}

400 / 500 Error:

{
    "error": "Error message."
}

/api/v1/write

POST Body: JSON quads

[{
    "subject": "Subject Node",
    "predicate": "Predicate Node",
    "object": "Object node",
    "label": "Label node"  // Optional
}]   // More than one quad allowed.

Response: JSON response message

/api/v1/write/file/nquad

POST Body: Form-encoded body:

• Key: NQuadFile, Value: N-Quad file to write.

Response: JSON response message

Example:

curl http://localhost:64210/api/v1/write/file/nquad -F NQuadFile=@30k.n3

/api/v1/delete

POST Body: JSON quads

[{
    "subject": "Subject Node",
    "predicate": "Predicate Node",
    "object": "Object node",
    "label": "Label node"  // Optional
}]   // More than one quad allowed.

Response: JSON response message.