Thalovant MCP

Last Edit: Claude Fable 5.1 - 2026-11-06 - Motive: Say what the 409 skill_unavailable_licensing and memory_limit refusals get as hints (0.7.1).

Thalovant MCP Server

Public-ready MCP server for Thalovant control-plane and hub runtime APIs.

It uses the official Thalovant Node.js SDK and the production MCP TypeScript SDK over stdio and Streamable HTTP, so it works with local MCP hosts such as Claude Desktop, Codex, Cursor, and remote MCP clients.

What It Includes

• stdio transport for local agents.
• Streamable HTTP transport at /mcp for remote agents.
• OAuth-style protected resource metadata at /.well-known/oauth-protected-resource.
• Static bearer tokens for simple/private deployments.
• JWT/JWKS and OAuth token introspection for production remote deployments.
• Per-principal Thalovant credentials and tool policy.
• Chat app tools: connectors, bridges and their status in words, pause and resume, chats, test messages and the plan's allowance. Bot tokens stay in the console.
• Host/origin validation, CORS, rate limiting, body limits, secure headers, and session binding.
• Optional resumability event storage and JSONL audit logs.
• Docker, Compose, Kubernetes, CI, npm package metadata, and MCP registry server.json.

Why TypeScript

Thalovant publishes SDKs for Python, Node.js, Go, and Rust. This server uses Node.js because @thalovant/sdk directly exposes the Thalovant control plane, identity loading, WSS/HTTPS/MQTT runtime clients, memory, analytics, and context helpers, while @modelcontextprotocol/sdk is the best-supported path for cross-agent stdio and Streamable HTTP servers.

Install

Run the published package with npx -y @thalovant/mcp-server, or build it from a checkout:

npm install

npm run build

Node.js 20 or newer is required.

Control-Plane Auth

Public hub discovery does not need Thalovant credentials. Private control-plane tools and runtime hub tools read credentials only from the MCP server environment or server-side principal credential files. Do not pass API tokens or passwords through chat or tool arguments.

The server selects control-plane auth in this order:

1. THALOVANT_API_TOKEN — a scoped Thalovant API token. Recommended.
2. THALOVANT_ACCESS_TOKEN — a pre-issued session access token.
3. THALOVANT_EMAIL + THALOVANT_PASSWORD — interactive-account login fallback.

When a token is set, the server never calls the login endpoint. thalovant_config_status reports the active mode as controlPlaneAuthMode without revealing token values.

With none of these configured, a person can sign the server in through the browser instead: see Device Sign-In. The token that sign-in mints is used only when nothing above is configured.

Device Sign-In

A tool call cannot wait for a person, so the device flow (RFC 8628) is two tools:

1. thalovant_begin_device_login with optional scopes (an empty list, like none, asks for the API's default), clientName and clientId answers loginId, userCode, verificationUri, verificationUriComplete, interval and expiresIn. Show the person the URL and the code. clientId signs in as a registered app, thalovant-home-assistant for Home Assistant: the approval page shows the platform's name for it as verified, and approving it again replaces the token it already holds. An id the API does not know is refused (400 unknown_client).
2. thalovant_poll_device_login with that loginId asks once. outcome is pending (poll again after interval seconds, already five seconds longer for good if the API asked to slow down), approved (with tokenId, scopes and expiresAt), expired or denied.

The device code and the token never reach the model: the server keeps both, bound to the principal that began the sign-in, for the life of the process. Once approved, every control-plane tool for that principal uses the token when no credential is configured. thalovant_revoke_device_login signs out: it revokes that token (a token may always revoke itself, and one already revoked counts as revoked) and forgets it; signing out again answers alreadyRevoked without a request, and configured tokens are never touched. A sign-in reaches only the configured API origin (THALOVANT_API_URL, or the default), since the verification URL it answers with is shown to a person. A Home Assistant link asks for hubs:read, clients:read and clients:write, which is also all a Free plan can approve.

API Tokens (Recommended For AI Agents And CI)

Scoped API tokens are the right credential for AI and automation use: they are minted from the Thalovant dashboard (or through the device flow), carry only the scopes you grant, can be revoked individually, and never involve your account password or MFA. Tokens start with tvpat_.

export THALOVANT_API_TOKEN="tvpat_..."

export THALOVANT_API_URL="https://api.thalovant.com"

npm start

Minimum scopes for the full control-plane tool surface:

The hub scopes imply one another: hubs:write grants hubs:read, which grants hubs:inspect and hubs:preview. Minting a token with hubs:read is therefore enough for every discovery tool in the table above.

Scope is not the whole story for provisioning. Every hub and runtime-group write also requires a paid plan, and the API checks scope *before* the plan, so the two failure modes are ordered:

• A token missing the scope fails 403 Insufficient scopes. Free-plan API tokens are capped at hubs:read, clients:read, and clients:write, so on the free tier provisioning fails with this 403 and never reaches the 402.
• A correctly scoped token on a free plan fails 402 API access requires a paid plan.
• thalovant_install_runtime_group_skill can fail with a second, distinct 402, This skill requires paid marketplace access for the tenant plan., when the plan is paid but does not include access_tier: paid catalog entries.

Discovery is deliberately not paid-gated: a free-tier token can browse the marketplace catalog and set hub ratings, but cannot install skills or provision hubs. Use thalovant_list_runtime_group_marketplace before installing — it reports installable, purchase_required, and access_message per skill, which turns an opaque 402 into a decision you can make up front.

Grant fewer scopes for narrower deployments: a read-only assistant needs only hubs:read and memory:read, and a discovery-only agent that browses skills but never provisions needs hubs:read alone. thalovant_get_analytics_overview with admin: true additionally requires an admin account with admin:analytics, which API tokens for regular use should not carry. Runtime hub tools (thalovant_ask, thalovant_send_action, and friends) use Thalovant client identities, not control-plane tokens.

Hub Etags

thalovant_update_hub and thalovant_delete_hub use optimistic locking and require the hub's current etag, sent as If-Match. The etag is only available in the body of the hub resource — the API sends no ETag response header — so an agent must call thalovant_get_hub first and pass the etag field from that response. A missing or stale value fails 412 ETag mismatch and changes nothing; re-fetch and retry. name, namespace, and domain are immutable after creation, so thalovant_update_hub does not accept them at all; send only the fields you are changing rather than round-tripping a whole hub resource. Runtime-group writes do not use etags.

Hub Skills

thalovant_list_hub_skills, thalovant_install_hub_skill, thalovant_update_hub_skill, and thalovant_remove_hub_skill select a hub's attached runtime group; all hubs sharing it are affected. A hub can start with no skills at all and gain them one at a time; a change applies live on the hub in about 15 seconds with no restart. hubId must be the hub UUID — the authenticated hub routes reject slugs.

thalovant_list_hub_skills returns the whole GET /v1/hubs/{hub_id}/skills envelope: hub_id, runtime_group_id, observed_at, source, the runtime's phase and message, and data, one row per skill (possibly empty) with skill, title, marketplace_skill_id, package_name, source_type, install_source, version, version_pin, installed_version, observed_version, previous_version, latest_version, available_version, update_available, changelog, active, state, the runtime's phase, message and last error, and last_transition_at. state is one of pending, installed, failed, removing, drifted, quarantined, or unmanaged; a change in progress shows as pending.

Each write answers 202 with operation_id, hub_id, runtime_group_id, skill, version (null for a removal), previous_version, and state (installing, updating, or removing); pass wait: true to poll that operation every 2 s until it converges (installed, or removed for a removal; a failed or timed_out operation raises an error carrying its error_message), with a 120 s default timeoutMs, or follow it yourself with thalovant_get_operation. Installing a skill that is already installed at another version performs an update; the same version fails 409 with code skill_version_already_installed. A hub with no runtime group fails 404 with code hub_without_runtime_group (a plain 404 means an unknown hub or a skill that is not installed), and an unresolvable latest or an invalid version fails 422. Errors are RFC 7807 problem bodies; the tool error keeps the short message, which appends the root code in parentheses, for example Thalovant API request failed with HTTP 409: Skill version already installed. (skill_version_already_installed), and then the code and the body's other fields (see Tool Errors). A skill the store does not install for licensing reasons (YouTube, YouTube Music, Spotify, SoundCloud and Bandcamp: the service's