SDK reference

@3ngram/sdk is a thin TypeScript client over the REST /api/v1 surface. It takes explicit configuration and sends the configured API key as X-API-Key on every request.

Install with npm install @3ngram/sdk (or pnpm add @3ngram/sdk). The package ships ESM with bundled type declarations.

Client setup

import { ThreengramClient } from '@3ngram/sdk'

const apiKey = process.env.THREENGRAM_API_KEY
if (apiKey === undefined) throw new Error('missing THREENGRAM_API_KEY')

const client = new ThreengramClient({
  baseUrl: 'https://api.3ngram.ai',
  apiKey,
})

Config	Description
`baseUrl`	REST origin without `/api/v1`. Trailing slashes are trimmed.
`apiKey`	API key sent as the `X-API-Key` header. The SDK has no env fallback.

Methods

remember

Append a typed memory. Commitment outputs include a commitmentId. Signature: remember(input: RememberToolArgs): Promise<RememberToolOutput>
REST route: POST /api/v1/memories

Example

await client.remember({
  memoryType: 'decision',
  topic: 'search backend',
  content: 'Use Postgres full-text search for v1.',
  scope: 'work',
  project: '3ngram',
})

Input schema

{
  "type": "object",
  "properties": {
    "memoryType": {
      "type": "string",
      "enum": [
        "decision",
        "commitment",
        "blocker",
        "fact",
        "preference",
        "pattern",
        "note",
        "event"
      ]
    },
    "topic": {
      "type": "string",
      "minLength": 1,
      "maxLength": 256
    },
    "content": {
      "type": "string",
      "minLength": 1,
      "maxLength": 2000
    },
    "scope": {
      "default": "personal",
      "type": "string",
      "minLength": 1,
      "maxLength": 64,
      "pattern": "^[a-z0-9][a-z0-9-]*$"
    },
    "project": {
      "type": "string",
      "minLength": 1,
      "maxLength": 256
    },
    "tags": {
      "default": [],
      "maxItems": 32,
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1,
        "maxLength": 64
      }
    }
  },
  "required": [
    "memoryType",
    "topic",
    "content"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "memory": {
      "type": "object",
      "properties": {
        "id": {
          "type": "string",
          "format": "uuid",
          "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
        },
        "memoryType": {
          "type": "string",
          "enum": [
            "decision",
            "commitment",
            "blocker",
            "fact",
            "preference",
            "pattern",
            "note",
            "event"
          ]
        },
        "topic": {
          "type": "string"
        },
        "scope": {
          "type": "string",
          "minLength": 1,
          "maxLength": 64,
          "pattern": "^[a-z0-9][a-z0-9-]*$"
        },
        "project": {
          "anyOf": [
            {
              "type": "string",
              "minLength": 1,
              "maxLength": 256
            },
            {
              "type": "null"
            }
          ]
        }
      },
      "required": [
        "id",
        "memoryType",
        "topic",
        "scope",
        "project"
      ],
      "additionalProperties": false
    },
    "embedded": {
      "type": "string",
      "enum": [
        "pending",
        "done",
        "failed",
        "off"
      ]
    },
    "commitmentId": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
    }
  },
  "required": [
    "memory",
    "embedded"
  ],
  "additionalProperties": false
}

search

Run semantic and keyword retrieval with optional pre-fusion filters. Signature: search(query: string, opts?: SearchOptions): Promise<SearchToolOutput>
REST route: POST /api/v1/search

Example

await client.search('oauth refresh token', {
  limit: 5,
  scope: 'work',
  project: '3ngram',
})

Input schema

{
  "type": "object",
  "properties": {
    "query": {
      "type": "string",
      "minLength": 1
    },
    "limit": {
      "default": 5,
      "type": "integer",
      "minimum": 1,
      "maximum": 25
    },
    "memoryType": {
      "type": "string",
      "enum": [
        "decision",
        "commitment",
        "blocker",
        "fact",
        "preference",
        "pattern",
        "note",
        "event"
      ]
    },
    "scope": {
      "type": "string",
      "minLength": 1,
      "maxLength": 64,
      "pattern": "^[a-z0-9][a-z0-9-]*$"
    },
    "project": {
      "type": "string",
      "minLength": 1,
      "maxLength": 256
    },
    "status": {
      "type": "string",
      "enum": [
        "active",
        "archived"
      ]
    },
    "asOf": {
      "type": "object",
      "properties": {
        "validAt": {
          "type": "string",
          "format": "date-time",
          "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$"
        },
        "asKnownAt": {
          "type": "string",
          "format": "date-time",
          "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$"
        }
      },
      "additionalProperties": false
    }
  },
  "required": [
    "query"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "hits": {
      "maxItems": 25,
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "id": {
            "type": "string",
            "format": "uuid",
            "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
          },
          "memoryType": {
            "type": "string"
          },
          "topic": {
            "type": "string"
          },
          "content": {
            "type": "string",
            "maxLength": 600
          },
          "contentLength": {
            "type": "integer",
            "minimum": 0,
            "maximum": 9007199254740991
          },
          "truncated": {
            "type": "boolean"
          },
          "score": {
            "type": "number"
          }
        },
        "required": [
          "id",
          "memoryType",
          "topic",
          "content",
          "contentLength",
          "truncated",
          "score"
        ],
        "additionalProperties": false
      }
    },
    "count": {
      "type": "integer",
      "minimum": 0,
      "maximum": 9007199254740991
    }
  },
  "required": [
    "hits",
    "count"
  ],
  "additionalProperties": false
}

getFacts

Read currently-valid facts, with optional bi-temporal filters. Signature: getFacts(filters?: FactsQueryArgs): Promise<FactsToolOutput>
REST route: GET /api/v1/facts

Example

await client.getFacts({
  subject: '3ngram',
  predicate: 'status',
  limit: 20,
})

Input schema

{
  "type": "object",
  "properties": {
    "subject": {
      "type": "string",
      "minLength": 1
    },
    "predicate": {
      "type": "string",
      "minLength": 1
    },
    "asOf": {
      "type": "object",
      "properties": {
        "validAt": {
          "type": "string",
          "format": "date-time",
          "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$"
        },
        "asKnownAt": {
          "type": "string",
          "format": "date-time",
          "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$"
        }
      },
      "additionalProperties": false
    },
    "limit": {
      "default": 50,
      "type": "integer",
      "minimum": 1,
      "maximum": 200
    }
  },
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "facts": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "id": {
            "type": "string",
            "format": "uuid",
            "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
          },
          "subject": {
            "type": "string"
          },
          "predicate": {
            "type": "string"
          },
          "value": {
            "type": "string"
          },
          "confidence": {
            "anyOf": [
              {
                "type": "number"
              },
              {
                "type": "null"
              }
            ]
          },
          "validFrom": {
            "type": "string",
            "format": "date-time",
            "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$"
          },
          "validTo": {
            "anyOf": [
              {
                "type": "string",
                "format": "date-time",
                "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d(?::[0-5]\\d(?:\\.\\d+)?)?(?:Z))$"
              },
              {
                "type": "null"
              }
            ]
          }
        },
        "required": [
          "id",
          "subject",
          "predicate",
          "value",
          "confidence",
          "validFrom",
          "validTo"
        ],
        "additionalProperties": false
      }
    },
    "count": {
      "type": "integer",
      "minimum": 0,
      "maximum": 9007199254740991
    }
  },
  "required": [
    "facts",
    "count"
  ],
  "additionalProperties": false
}

revise

Create a corrected successor memory and link it to the predecessor. Signature: revise(predecessorId: string, input: ReviseBody): Promise<ReviseToolOutput>
REST route: POST /api/v1/memories/:id/revise

Example

await client.revise(memoryId, {
  memoryType: 'decision',
  topic: 'search backend',
  content: 'Use Postgres full-text search plus embeddings for v1.',
  edgeIntent: 'updates',
})

Input schema

{
  "type": "object",
  "properties": {
    "memoryType": {
      "type": "string",
      "enum": [
        "decision",
        "commitment",
        "blocker",
        "fact",
        "preference",
        "pattern",
        "note",
        "event"
      ]
    },
    "topic": {
      "type": "string",
      "minLength": 1,
      "maxLength": 256
    },
    "content": {
      "type": "string",
      "minLength": 1,
      "maxLength": 2000
    },
    "scope": {
      "default": "personal",
      "type": "string",
      "minLength": 1,
      "maxLength": 64,
      "pattern": "^[a-z0-9][a-z0-9-]*$"
    },
    "project": {
      "type": "string",
      "minLength": 1,
      "maxLength": 256
    },
    "tags": {
      "default": [],
      "maxItems": 32,
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1,
        "maxLength": 64
      }
    },
    "edgeIntent": {
      "default": "supersedes",
      "type": "string",
      "enum": [
        "supersedes",
        "updates"
      ]
    }
  },
  "required": [
    "memoryType",
    "topic",
    "content"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "memory": {
      "type": "object",
      "properties": {
        "id": {
          "type": "string",
          "format": "uuid",
          "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
        },
        "memoryType": {
          "type": "string",
          "enum": [
            "decision",
            "commitment",
            "blocker",
            "fact",
            "preference",
            "pattern",
            "note",
            "event"
          ]
        },
        "topic": {
          "type": "string"
        },
        "scope": {
          "type": "string",
          "minLength": 1,
          "maxLength": 64,
          "pattern": "^[a-z0-9][a-z0-9-]*$"
        },
        "project": {
          "anyOf": [
            {
              "type": "string",
              "minLength": 1,
              "maxLength": 256
            },
            {
              "type": "null"
            }
          ]
        }
      },
      "required": [
        "id",
        "memoryType",
        "topic",
        "scope",
        "project"
      ],
      "additionalProperties": false
    },
    "embedded": {
      "type": "string",
      "enum": [
        "pending",
        "done",
        "failed",
        "off"
      ]
    }
  },
  "required": [
    "memory",
    "embedded"
  ],
  "additionalProperties": false
}

resolve

Transition the commitment riding a memory, or archive an active blocker. Signature: resolve(memoryId: string, status: CommitmentStatus): Promise<ResolveToolOutput>
REST route: POST /api/v1/memories/:id/resolve

Example

await client.resolve(memoryId, 'resolved')

Input schema

{
  "type": "object",
  "properties": {
    "status": {
      "type": "string",
      "enum": [
        "open",
        "waiting",
        "resolved",
        "expired"
      ]
    }
  },
  "required": [
    "status"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "commitmentId": {
      "type": "string",
      "format": "uuid",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
    },
    "status": {
      "anyOf": [
        {
          "type": "string",
          "enum": [
            "open",
            "waiting",
            "resolved",
            "expired"
          ]
        },
        {
          "type": "string",
          "enum": [
            "archived"
          ]
        }
      ]
    }
  },
  "required": [
    "commitmentId",
    "status"
  ],
  "additionalProperties": false
}

Errors

Error	Description
`ThreengramApiError`	Thrown for non-2xx REST responses. Carries status and reason from the response body.
`ThreengramNetworkError`	Thrown when fetch rejects before a server response is available.

MCP reference

CLI & SDK

API reference

Client setup

Methods

remember

Example

Input schema

Output schema

search

Example

Input schema

Output schema

getFacts

Example

Input schema

Output schema

revise

Example

Input schema

Output schema

resolve

Example

Input schema

Output schema

Errors

​Client setup

​Methods

​remember

​Example

​Input schema

​Output schema

​search

​Example

​Input schema

​Output schema

​getFacts

​Example

​Input schema

​Output schema

​revise

​Example

​Input schema

​Output schema

​resolve

​Example

​Input schema

​Output schema

​Errors

Client setup

Methods

remember

Example

Input schema

Output schema

search

Example

Input schema

Output schema

getFacts

Example

Input schema

Output schema

revise

Example

Input schema

Output schema

resolve

Example

Input schema

Output schema

Errors