Cernion Project graph API
The Project graph API from Cernion — 3 operation(s) for project graph.
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curl "https://apis.io/api/v1/apis/cernion-de:cernion-de-project-graph-api"
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OpenAPI Specification
openapi: 3.2.0
info:
title: Cernion Energy Tools Project graph API
version: 0.99.22
description: 'MicroService Agent System for Energy Markets - REST API with AI integration.
CERNION_TOKEN: request at https://cernion.de/ or by email: dev@stromdao.com.
For the public instance at https://api.cernion.de/, create your token at https://cernion.de/cet-token/.'
servers:
- url: https://api.cernion.de
description: API Server
tags:
- name: Project graph
paths:
/api/project-graph/:projectId/nodes:
get:
summary: Find visible project nodes by kind and label
tags:
- Project graph
operationId: project_graph_nodes
parameters:
- name: projectId
in: path
required: true
schema:
type: string
example: project-example
- name: kind
in: query
required: false
schema:
type: string
example: dataset
- name: label
in: query
required: false
schema:
type: string
example: node-example
- name: limit
in: query
required: false
schema:
type: integer
minimum: 1
maximum: 1000
example: 1
- $ref: '#/components/parameters/TokenQuery'
responses:
'200':
description: Visible project graph; bounded traversal and provenance
content:
application/json:
schema:
type: object
properties:
nodes:
type: array
items:
type: object
required:
- nodeId
- projectId
- kind
- ref
- labels
- attributes
- provenance
- derivation
properties:
nodeId:
type: string
projectId:
type: string
kind:
type: string
enum:
- object
- dataset
- section
- entity
- skill
- external
ref: {}
labels:
type: array
items:
type: string
attributes:
type: object
additionalProperties: true
provenance:
type: object
additionalProperties: true
derivation:
type: object
properties:
version:
type: string
edges:
type: array
items:
type: object
required:
- edgeId
- projectId
- from
- to
- relation
- weight
- evidence
- origin
- derivation
properties:
edgeId:
type: string
projectId:
type: string
from:
type: string
to:
type: string
relation:
type: string
enum:
- contains
- derivedFrom
- describes
- sameEntity
- joinsOn
- timeAligned
- references
- answeredBy
weight:
type: number
minimum: 0
maximum: 1
evidence:
type: array
items:
type: object
additionalProperties: true
origin:
type: string
enum:
- derived
- observed
- corrected
derivation:
type: object
properties:
version:
type: string
truncated:
type: boolean
'404':
description: Project or node absent or invisible
/api/project-graph/:projectId/neighbors:
get:
summary: Read project neighbors with bounded depth
tags:
- Project graph
operationId: project_graph_neighbors
parameters:
- name: projectId
in: path
required: true
schema:
type: string
example: project-example
- name: nodeId
in: query
required: true
schema:
type: string
example: node-example
- name: relation
in: query
required: false
schema:
type: string
example: joinsOn
- name: depth
in: query
required: false
schema:
type: integer
minimum: 1
maximum: 3
example: 1
- name: limit
in: query
required: false
schema:
type: integer
minimum: 1
maximum: 1000
example: 1
- $ref: '#/components/parameters/TokenQuery'
responses:
'200':
description: Visible project graph; bounded traversal and provenance
content:
application/json:
schema:
type: object
properties:
nodes:
type: array
items:
type: object
required:
- nodeId
- projectId
- kind
- ref
- labels
- attributes
- provenance
- derivation
properties:
nodeId:
type: string
projectId:
type: string
kind:
type: string
enum:
- object
- dataset
- section
- entity
- skill
- external
ref: {}
labels:
type: array
items:
type: string
attributes:
type: object
additionalProperties: true
provenance:
type: object
additionalProperties: true
derivation:
type: object
properties:
version:
type: string
edges:
type: array
items:
type: object
required:
- edgeId
- projectId
- from
- to
- relation
- weight
- evidence
- origin
- derivation
properties:
edgeId:
type: string
projectId:
type: string
from:
type: string
to:
type: string
relation:
type: string
enum:
- contains
- derivedFrom
- describes
- sameEntity
- joinsOn
- timeAligned
- references
- answeredBy
weight:
type: number
minimum: 0
maximum: 1
evidence:
type: array
items:
type: object
additionalProperties: true
origin:
type: string
enum:
- derived
- observed
- corrected
derivation:
type: object
properties:
version:
type: string
truncated:
type: boolean
'404':
description: Project or node absent or invisible
/api/project-graph/:projectId/resolve:
get:
summary: Resolve project attributes through sameEntity and joinsOn
tags:
- Project graph
operationId: project_graph_resolve
parameters:
- name: projectId
in: path
required: true
schema:
type: string
example: project-example
- name: nodeId
in: query
required: true
schema:
type: string
example: node-example
- name: depth
in: query
required: false
schema:
type: integer
minimum: 1
maximum: 3
example: 1
- name: limit
in: query
required: false
schema:
type: integer
minimum: 1
maximum: 1000
example: 1
- $ref: '#/components/parameters/TokenQuery'
responses:
'200':
description: Visible project graph; bounded traversal and provenance
content:
application/json:
schema:
type: object
properties:
nodes:
type: array
items:
type: object
required:
- nodeId
- projectId
- kind
- ref
- labels
- attributes
- provenance
- derivation
properties:
nodeId:
type: string
projectId:
type: string
kind:
type: string
enum:
- object
- dataset
- section
- entity
- skill
- external
ref: {}
labels:
type: array
items:
type: string
attributes:
type: object
additionalProperties: true
provenance:
type: object
additionalProperties: true
derivation:
type: object
properties:
version:
type: string
edges:
type: array
items:
type: object
required:
- edgeId
- projectId
- from
- to
- relation
- weight
- evidence
- origin
- derivation
properties:
edgeId:
type: string
projectId:
type: string
from:
type: string
to:
type: string
relation:
type: string
enum:
- contains
- derivedFrom
- describes
- sameEntity
- joinsOn
- timeAligned
- references
- answeredBy
weight:
type: number
minimum: 0
maximum: 1
evidence:
type: array
items:
type: object
additionalProperties: true
origin:
type: string
enum:
- derived
- observed
- corrected
derivation:
type: object
properties:
version:
type: string
truncated:
type: boolean
'404':
description: Project or node absent or invisible
components:
parameters:
TokenQuery:
name: token
in: query
required: false
schema:
type: string
description: Optional Cernion MCP token as URL query parameter. If provided, it overrides CERNION_TOKEN for this request. Prefer Authorization Bearer header in production to reduce token exposure in URLs/logs.
securitySchemes:
ApiKeyAuth:
type: apiKey
in: header
name: X-API-Key
BearerAuth:
type: http
scheme: bearer
bearerFormat: JWT
description: 'Optional Cernion MCP token. If not provided, falls back to CERNION_TOKEN from environment. Request token at https://cernion.de/ or by email: dev@stromdao.com.'