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.
• 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

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.

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 act on one hub, not on a runtime group's skill set. 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 and appends the root code in parentheses, for example Thalovant API request failed with HTTP 409: Skill version already installed. (skill_version_already_installed).

Listing needs hubs:inspect (implied by hubs:read); the writes need hubs:write and a paid plan, and because scope is checked before plan a free-plan token sees 403, never 402. Hub-restricted tokens (a hub_ids allowlist) are honoured on all four routes. The server uses the published Node SDK hub-skill methods and preserves MCP cancellation checks during polling. A failed status read retains the accepted operation ID; use thalovant_get_operation with that ID instead of submitting the write again. No new poll starts at or after the polling deadline. That deadline does not cancel an HTTP request already in flight.

Login Fallback

export THALOVANT_EMAIL="you@example.com"
export THALOVANT_PASSWORD="..."

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

npm start

If neither a token nor email/password is configured, authenticated control-plane tools fail with a clear error naming the supported options.

Configured API tokens and login credentials are bound to the origin of their configured apiUrl or THALOVANT_API_URL (default https://api.thalovant.com). A tool argument cannot redirect those credentials to another origin. Equivalent URL spellings and paths on the same origin are allowed; custom origins must be configured alongside their credentials. Anonymous public discovery may still select a custom API URL.

Local Stdio

The server speaks MCP over stdio and does not write logs to stdout.

Runtime hub tools load local identities in this order:

1. identityFile tool argument.
2. configPath or profile tool argument.
3. Thalovant SDK environment identity variables.
4. The default Thalovant SDK config profile.

Keep Thalovant identity files secret. The SDK expects protected config files such as ~/.config/thalovant/config.yaml with mode 0600.

Streamable HTTP

Remote mode uses MCP Streamable HTTP at /mcp and requires bearer authentication by default.

export MCP_TRANSPORT="http"
export MCP_HTTP_HOST="127.0.0.1"
export MCP_HTTP_PORT="3000"
export MCP_HTTP_AUTH_TOKEN="$(openssl rand -hex 32)"
export MCP_HTTP_ALLOWED_HOSTS="127.0.0.1:3000,localhost:3000"

npm run start:http

Clients connect to:

http://127.0.0.1:3000/mcp
Authorization: Bearer <token>

Health checks are available at /healthz and /readyz.

For public deployments, set the public URL and exact host/origin allowlists:

export MCP_HTTP_HOST="0.0.0.0"
export MCP_HTTP_PORT="3000"
export MCP_PUBLIC_URL="https://mcp.example.com"
export MCP_HTTP_ALLOWED_HOSTS="mcp.example.com"
export MCP_HTTP_ALLOWED_ORIGINS="https://agent.example.com"

Remote Auth

Use static bearer tokens only for local, private, or single-tenant deployments:

export MCP_HTTP_AUTH_TOKEN="$(openssl rand -hex 32)"
# or
export MCP_HTTP_AUTH_TOKENS="token-a,token-b"

Use JWT/JWKS for production resource-server validation:

export MCP_HTTP_AUTH_MODE="jwt"
export MCP_OAUTH_ISSUER="https://auth.example.com/"
export MCP_OAUTH_JWKS_URL="https://auth.example.com/.well-known/jwks.json"
export MCP_OAUTH_AUDIENCE="https://mcp.example.com/mcp"
export MCP_OAUTH_AUTHORIZATION_SERVERS="https://auth.example.com/"
export MCP_OAUTH_REQUIRED_SCOPES="mcp:thalovant"

Use introspection when your authorization server issues opaque tokens:

export MCP_HTTP_AUTH_MODE="introspection"
export MCP_OAUTH_INTROSPECTION_URL="https://auth.example.com/oauth2/introspect"
export MCP_OAUTH_CLIENT_ID="mcp-server-client"
export MCP_OAUTH_CLIENT_SECRET="..."
export MCP_OAUTH_AUDIENCE="https://mcp.example.com/mcp"
export MCP_OAUTH_AUTHORIZATION_SERVERS="https://auth.example.com/"
export MCP_OAUTH_REQUIRED_SCOPES="mcp:thalovant"

The server publishes protected resource metadata at:

https://mcp.example.com/.well-known/oauth-protected-resource

401 responses include WWW-Authenticate with a resource_metadata pointer for MCP clients that support OAuth discovery.

Principal Credentials

For multi-user remote deployments, do not share one Thalovant access token across all MCP users. Map each authenticated MCP principal to its own Thalovant control-plane token, runtime identity, and tool policy.

Single file:

export THALOVANT_PRINCIPAL_CREDENTIALS_FILE="/run/secrets/thalovant-principals.json"

Directory mode:

export THALOVANT_PRINCIPAL_CREDENTIALS_DIR="/run/secrets/thalovant-principals"

Directory files are named <sha256(principal-id)>.json. The server checks the OAuth subject, principal id, and client id. See examples/principal-credentials.sample.json.

Keep this disabled for multi-user deployments unless you intentionally want every remote principal to use the server environment's Thalovant credentials:

export THALOVANT_ALLOW_SHARED_CREDENTIALS="false"

Runtime identityFile, configPath, profile, and fromEnv tool arguments are disabled for remote principals by default. Set MCP_HTTP_ALLOW_CLIENT_CREDENTIAL_PATHS=true only for trusted private deployments.

Policy, Audit, And Resumability

Global tool policy:

export MCP_TOOL_ALLOWLIST="thalovant_*"
export MCP_TOOL_DENYLIST="thalovant_delete_memory_item"

Per-principal credential files may also include allowedTools and deniedTools.

Both are call-time filters, and an empty allowlist means "allow everything". They cannot make a tool default-off or hide it from tools/list, which is why the two destructive control-plane tools are gated separately by THALOVANT_ENABLE_DESTRUCTIVE_TOOLS. See Destructive Tools.

Audit logs:

export MCP_AUDIT_LOG="stderr" # off, stderr, file, or both
export MCP_AUDIT_LOG_FILE="/var/log/thalovant-mcp/audit.jsonl"
export MCP_AUDIT_INCLUDE_ARGS="false"

Audit entries are JSONL and credential-shaped fields are redacted.

Streamable HTTP resumability defaults to an in-memory event store. Use a file-backed store for single-instance restarts:

export MCP_EVENT_STORE_FILE="/var/lib/thalovant-mcp/events.jsonl"

HTTP Hardening

• Bearer auth is required unless MCP_HTTP_ALLOW_UNAUTHENTICATED=true is explicitly set.
• Host headers are allowlisted to reduce DNS rebinding risk.
• Browser Origin headers are rejected unless they exactly match MCP_HTTP_ALLOWED_ORIGINS.
• CORS exposes only MCP session/protocol headers.
• Sessions use cryptographically random ids and are bound to the authenticated principal.
• Request bodies are capped by MCP_HTTP_MAX_BODY_BYTES, defaulting to 1 MiB.
• Fixed-window rate limiting defaults to 120 MCP requests per minute per client address.
• Security headers include nosniff, DENY framing, no referrer, and a restrictive CSP.

Useful HTTP environment variables:

MCP_HTTP_PATH=/mcp
MCP_HTTP_RATE_LIMIT_MAX=120
MCP_HTTP_RATE_LIMIT_WINDOW_MS=60000
MCP_HTTP_SESSION_TTL_MS=3600000
MCP_HTTP_MAX_BODY_BYTES=1048576
MCP_HTTP_ENABLE_JSON_RESPONSE=false
MCP_HTTP_TRUST_PROXY=false

Claude Desktop

Recommended: authenticate with a scoped API token so the MCP config never contains your account password.

{
  "mcpServers": {
    "thalovant": {
      "command": "node",
      "args": ["/home/goldyfruit/Development/Thalovant/mcp/dist/index.js"],
      "env": {
        "THALOVANT_API_TOKEN": "tvpat_...",
        "THALOVANT_PROFILE": "prod"
      }
    }
  }
}

Codex

Use the same stdio command in your MCP client config:

{
  "mcpServers": {
    "thalovant": {
      "command": "node",
      "args": ["/home/goldyfruit/Development/Thalovant/mcp/dist/index.js"],
      "env": {
        "THALOVANT_API_TOKEN": "tvpat_...",
        "THALOVANT_PROFILE": "prod"
      }
    }
  }
}

Tools

Read-only:

• thalovant_config_status
• thalovant_list_public_hubs
• thalovant_get_public_hub
• thalovant_list_hubs
• thalovant_get_hub
• thalovant_get_operation
• thalovant_identity_status
• thalovant_healthcheck
• thalovant_intent_inventory
• thalovant_wait_for_event
• thalovant_get_analytics_overview
• thalovant_list_memory_items
• thalovant_get_memory_summary
• thalovant_get_memory_item

Skill and runtime-group discovery (read-only):

• thalovant_list_marketplace_skills
• thalovant_list_runtime_group_marketplace
• thalovant_list_runtime_group_inventory
• thalovant_list_runtime_groups
• thalovant_get_runtime_group
• thalovant_get_runtime_group_config
• thalovant_get_hub_runtime_capabilities

Writes or hub events:

• thalovant_create_client_identity
• thalovant_ask
• thalovant_query
• thalovant_send_action
• thalovant_send_code
• thalovant_emit_event
• thalovant_create_memory_item
• thalovant_update_memory_item
• thalovant_delete_memory_item

Hub and runtime-group provisioning:

• thalovant_create_hub
• thalovant_update_hub
• thalovant_release_hub
• thalovant_set_hub_rating
• thalovant_clear_hub_rating
• thalovant_create_runtime_group
• thalovant_update_runtime_group
• thalovant_update_runtime_group_config
• thalovant_release_runtime_group
• thalovant_install_runtime_group_skill
• thalovant_uninstall_runtime_group_skill

Hub skills, acting on one hub (see Hub Skills; the list tool is read-only):

• thalovant_list_hub_skills
• thalovant_install_hub_skill
• thalovant_update_hub_skill
• thalovant_remove_hub_skill

Destructive, not registered unless explicitly enabled (see Destructive Tools):

• thalovant_delete_hub
• thalovant_delete_runtime_group

Tool outputs redact credential-shaped fields. thalovant_create_client_identity does not return secret identity material; pass savePath when you want the full identity written to a local file with mode 0600. savePath is confined to the server's identity directory (THALOVANT_MCP_IDENTITY_DIR, default <config-dir>/thalovant/identities): pass a plain filename, since absolute paths outside that directory and .. traversal are rejected, so a model cannot drop a credential file into a git working tree or synced folder. thalovant_config_status reports the active identityDir.

thalovant_intent_inventory uses the runtime identity and accepts languages, describe, fallback, and a per-query/batch timeoutMs. It returns registered intents and examples, fallback skills, fallbacks_known, and may_answer by requested language. A missing or denied optional fallback-skill query remains unknown, rather than being reported as a known empty list. The optional probe adds at most 1500ms. A silent listing can use engine manifests; disable this with fallback: false. Both new tools are available in read-only mode and respect per-principal policy. thalovant_get_operation reads an operation ID returned by provisioning without replaying the write.

Destructive Tools

thalovant_delete_hub and thalovant_delete_runtime_group are disabled by default. They are not merely blocked when called — they are never registered, so they do not appear in tools/list and a model cannot see or attempt them.

A long-lived control-plane token combined with an always-available delete tool is a categorically different risk from a read or update tool: deleting a hub also deletes its dependent clients and ACLs, and none of it is reversible. So these two are opt-in:

export THALOVANT_ENABLE_DESTRUCTIVE_TOOLS="true"

Accepted true values are 1, true, yes, and on; anything else, including unset, leaves the tools off. The flag is read when a server instance is created. Restart the server process with the updated environment after changing it. thalovant_config_status reports the current state as destructiveToolsEnabled and lists the tools the flag controls.

This is a separate mechanism from the existing tool policy, deliberately. MCP_TOOL_ALLOWLIST / MCP_TOOL_DENYLIST and the per-principal allowedTools / deniedTools are call-time filters where an empty allowlist means "allow everything"; they cannot express a tool that is off until an operator turns it on, and they cannot hide a tool from tools/list. Once THALOVANT_ENABLE_DESTRUCTIVE_TOOLS is set the delete tools are ordinary tools again and remain subject to that policy, so the two layers compose:

# Register delete tools, then deny their use by every principal.
export THALOVANT_ENABLE_DESTRUCTIVE_TOOLS="true"
export MCP_TOOL_DENYLIST="thalovant_delete_hub,thalovant_delete_runtime_group"

The global deny applies to every principal and cannot be overridden by a principal's allowedTools. To restrict only selected principals, leave these tools out of the global denylist and use those principals' deniedTools instead.

Deleting a hub still requires a current etag (412 otherwise), and deleting a runtime group fails with 409 while it is the workspace default or still has hubs attached.

Non-Catalog Skill Sources

thalovant_install_runtime_group_skill installs from the vetted marketplace catalog by default. Any other source — notably sourceType: "git" with an arbitrary sourceRef repository URL — pulls code the marketplace never reviewed straight into a production runtime, and the control-plane validator is format-only with no host allowlist. Because the tools are driven by a model holding a long-lived token, non-catalog sources are refused unless an operator opts in:

export THALOVANT_ENABLE_GIT_SKILL_SOURCES="true"

With the flag unset, a call with any sourceType other than catalog fails before any control-plane request is made. Accepted true values are 1, true, yes, and on. thalovant_config_status reports the state as gitSkillSourcesEnabled. The tool is annotated destructiveHint: true.

Read-Only Mode

Set THALOVANT_MCP_READONLY=1 to register only tools annotated readOnlyHint: true. Write and destructive tools are then never registered and never appear in tools/list, so an operator can run an observe-only agent without hand-writing a denylist. Like the other registration-time gates it is read when a server instance is created; thalovant_config_status reports the state as readOnly.

HiveMind Runtime Compatibility

Runtime calls sharing the same hub client identity run sequentially within one MCP process. Use a distinct client identity for each independently running MCP server so the hub can keep their sessions separate.

Version 0.1.24 uses @thalovant/sdk ^0.3.16 (0.3.16 through versions below 0.4.0). This release enforces secure effective MQTT URLs and carries a single connection deadline through MQTT setup and HTTP failure cleanup. Runtime tools support HiveMind v3 Noise over WSS, HTTPS and MQTT over TLS. thalovant_healthcheck reports readiness only after authentication; a reachable hub or broker alone does not establish a runtime session.

Keep the SDK configuration directory persistent and private between server restarts (~/.config/thalovant, or the configured XDG/Windows equivalent). It contains the client Noise key and trusted server pins. An authentication failure preserves those pins; replacing a server key requires an explicit, verified trust change. HTTPS identities must advertise the hub's HTTPS plugin, and MQTT requires the identity's broker credentials and topic prefix.

Runtime tools retain their identity lease through actual cleanup. If the close caller times out, a later tool waits up to six seconds for that cleanup before opening a session. A queued tool that reaches this deadline fails without executing later or releasing the previous session's identity. An actual cleanup failure marks the identity unavailable to later calls instead of risking concurrent sessions. These leases are process-local; separate server processes or replicas need distinct runtime identities or external coordination.

MCP request cancellation applies to queued runtime tools in both stdio and Streamable HTTP mode. A cancelled queued call never constructs a runtime client or executes later. Cancellation also reaches runtime connection setup, Ask, Query and event waits. Action/code sends, raw event publication and inventory queries check cancellation during connection setup, then retain ownership until the admitted SDK operation finishes. Cancelling the MCP request cannot undo an already admitted operation or its effects. The identity remains reserved through that work and actual cleanup; application requests are never automatically replayed. Control-plane tools do not gain runtime cancellation semantics in this release.

For example, an MCP TypeScript client can cancel a runtime query after ten seconds, including time spent waiting for its identity lease:

await mcpClient.callTool({
  name: "thalovant_query",
  arguments: { identityFile: "/secure/identity.json", text: "What is the weather?", timeoutMs: 30000 },
}, undefined, { signal: AbortSignal.timeout(10000) });

Intent inventory retains its connection setup and per-query/batch budgets plus a separate optional fallback probe; it has no single inventory-wide deadline.

Development

npm run typecheck
npm test
npm run build
npm run test:smoke
npm run test:http
npm run bench
npm run bench:http
npm pack --dry-run

License

MIT. This is the right default for a public integration server: it is permissive, compatible with the MIT Thalovant Node SDK and MCP TypeScript SDK, and does not force downstream agent or enterprise users into a reciprocal licensing model.

Credential-bearing control-plane calls require HTTPS. Explicit loopback HTTP (localhost, 127.0.0.1, [::1]) remains supported for local development. API redirects are rejected so password-login bodies cannot be forwarded. Runtime clients are constructed only after acquiring their identity lease.

thalovant_query sends a routed HiveMind query; the hub may cascade it according to its routing policy. It accepts text, timeoutMs, lang, sessionId, requestId, queryId, context and replySettleMs, plus the runtime identity options, and returns the same normalized reply shape as thalovant_ask. A query may trigger actions, so read-only mode hides it. Conversation workflows use sessionId with ask/query and the existing event-wait tool; MCP does not expose one tool for every SDK conversation or event-listener method.