Moss - Real-time Semantic Search for Conversational AI

Initialize an upload session for creating a new index. Returns a presigned URL where you can upload your pre-computed index data, along with a jobId to use with startBuild once the upload completes. Required fields: indexName, modelId, docCount, dimension

Field	Type	Required	Notes
`indexName`	string	✅	Name for the new index.
`modelId`	string	✅	Embedding model identifier (e.g. `moss-minilm`).
`docCount`	integer	✅	Total number of documents being uploaded.
`dimension`	integer	✅	Embedding vector dimension (e.g. `384` for `moss-minilm`).

Example request

curl -X POST "https://service.usemoss.dev/v1/manage" \
  -H "Content-Type: application/json" \
  -H "x-service-version: v1" \
  -H "x-project-key: moss_access_key_xxxxx" \
  -d '{
    "action": "initUpload",
    "projectId": "project_123",
    "indexName": "support-faq",
    "modelId": "moss-minilm",
    "docCount": 2,
    "dimension": 384
  }'

Responses

{
  "jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "uploadUrl": "https://<bucket>.r2.cloudflarestorage.com/temp-uploads/<project_id>/<job_id>/data.bin?<signed_params>",
  "expiresIn": 3600
}

Field	Type	Notes
`jobId`	string	Use this ID with `startBuild` after uploading.
`uploadUrl`	string	Presigned URL to `PUT` your index data. Expires after `expiresIn` seconds.
`expiresIn`	integer	Seconds until the upload URL expires (default `3600`).

Errors

400 when docCount or dimension is missing or invalid.
404 if the project does not exist.

Getting Started

Index Management

Web Sources

Document Operations

Init Upload