Obsideo MCP server

Give any MCP-capable agent (Claude Desktop, Claude Code, Cursor, Cline, ...) durable, encrypted, cryptographically verified storage. Self-serve signup from inside the conversation: 12 GB free, no card, no CAPTCHA, no expiry.

Obsideo is S3-compatible object storage where every stored object is replicated to 3 providers and challenged with chunk-level merkle proofs on a continuous cycle; providers are paid only for proofs they pass. Paid tier: $15/TB-month, egress included.

Privacy posture (read this first)

• This server runs on YOUR machine. Obsideo never hosts it. Credentials, the account signing key, and the optional encryption key live in ~/.obsideo/ and are sent nowhere except the endpoints they authenticate against.

• The account signing key is generated locally; only the public half is ever sent. Keep ~/.obsideo/signing.pem private. Re-running signup rotates credentials and the keypair with no overlap, so do not re-run casually.

• Optional encrypt-first storage: put with encrypt: true encrypts client-side (AES-256-GCM) with a locally generated, user-held key before upload. The platform then stores ciphertext it is architecturally incapable of reading. Key loss means those objects are unrecoverable; back up ~/.obsideo/mcp.json.

Related MCP server: Structured-sh

Install

Claude Desktop, one click: download obsideo-mcp.mcpb from the latest release, then Settings -> Extensions and drag the file in. No Node or npm setup needed.

Everything else, via npx:

{
  "mcpServers": {
    "obsideo": {
      "command": "npx",
      "args": ["-y", "obsideo-mcp"]
    }
  }
}

(Claude Desktop: claude_desktop_config.json. Claude Code: claude mcp add obsideo -- npx -y obsideo-mcp. Cursor/Cline: their MCP settings, same command.)

Tools

A verify_proofs tool (per-object possession-proof status) will be added when the customer proofs API ships.

What it is good for

App file storage, automated backups (databases, snapshots, state), agent artifacts and memory that must survive sessions and machines, provable offsite copies. Not a CDN, not a queryable database, not sub-millisecond storage; Obsideo stores objects and backup artifacts.

Full integration contract (per-step postconditions, error table): obsideo.io/agents.md

Verified

Every tool in this server was exercised end to end against the production gateway before release, including an encrypted put/get roundtrip verified hash-exact (sha256) and labeled-error passthrough from the signup service.

License

MIT

Privacy Policy

This extension runs entirely on your machine. Credentials, your account signing key, and any client-side encryption key are stored locally in ~/.obsideo/mcp.json and are never sent to or hosted by Obsideo. Conversation content from your AI assistant is not collected; only the tool calls you make (for example an upload) reach the storage service.

Full policy: https://obsideo.io/privacy/