mistral-mcp Server

MCP server exposing the full Mistral AI surface (chat, OCR, Codestral FIM, Voxtral audio, vision, agents, moderation, classification, files, batch). Stdio + Streamable HTTP, BYOK with Mistral's free 1B tokens/month

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mistral-mcp

MCP server for Mistral AI — chat, OCR, audio (Voxtral), code (Codestral), vision, agents, batch, and durable workflows. Plug into Claude Code, Cursor, Zed, Windsurf, or Claude Desktop in one command.

Version française : README.fr.md

What this is

mistral-mcp exposes the full Mistral AI API as a set of MCP tools, resources, and prompts. An MCP client (Claude Code, Cursor, etc.) can call mistral_ocr to extract text from a PDF, voxtral_transcribe to transcribe a meeting recording, or workflow_execute to start a durable multi-step process — all without leaving the agent loop.

Unique to Mistral and not available from other MCP servers:

mistral_ocr — Mistral Document AI: structured text + bbox annotations from any PDF or image
voxtral_transcribe — Voxtral: transcription with optional speaker diarization
codestral_fim — Codestral fill-in-the-middle (FIM) for inline code completion
workflow_execute / status / interact — Temporal-backed durable execution with human-in-the-loop signals
French-optimized models (mistral-large-latest, mistral-medium-latest) and curated French prompts

What this server does not expose: fine-tuning, user management, non-FR/EN prompts.

Why this matters for European teams

mistral-mcp is designed for teams that want to use Mistral capabilities inside MCP clients (Claude Code, Cursor, Zed, Windsurf, Claude Desktop) while keeping control over deployment, API keys, cache behavior, and tool exposure.

This can be useful for European organisations evaluating AI stacks under GDPR, DORA, sector-specific constraints (HDS, EBA), or internal sovereignty requirements.

What this project provides:

self-hosted MCP server, no mandatory SaaS proxy
bring-your-own Mistral API key (BYOK) — Mistral states API data is not used to train its models
lean core profile and focused metier-docs profile to limit tool exposure
process_document cache configurable per-call and via MISTRAL_MCP_CACHE_DIR
ID document cache bypass enabled by default, even when kind:"auto" resolves to id_document
Streamable HTTP + bearer auth path for controlled / on-prem deployments
French-first prompts and skills (meeting minutes, legal summary, invoice reminder, commit message, email reply)
free Experiment tier on the Mistral side covers most evaluation needs (~1B tokens/month)

What this project does NOT claim:

it is not a GDPR, DORA, HDS, or ISO certification, and it does not replace a DPIA, vendor review, security audit, or legal assessment
Mistral provider terms, data residency, subprocessor list, retention settings, and incident handling must be reviewed separately at mistral.ai/terms and legal.mistral.ai
this repo is community-maintained, not an official Mistral integration; nothing here modifies Mistral's contractual data terms with you

In practice, mistral-mcp reduces the integration surface you have to assess. It does not replace the legal/compliance work itself.

Quick start

Claude Code (recommended — auto-installs, prompts for API key, ships 11 skills):

/plugin install mistral-mcp@swih-plugins

Cursor / Zed / Windsurf / Claude Desktop — add to your MCP settings JSON:

{
  "mcpServers": {
    "mistral": {
      "command": "npx",
      "args": ["-y", "mistral-mcp@latest"],
      "env": { "MISTRAL_API_KEY": "your_key_here" }
    }
  }
}

Manual Claude Code registration:

claude mcp add mistral -- npx -y mistral-mcp@latest

Profiles

MISTRAL_MCP_PROFILE controls how many tools are exposed (default: core).

Profile	Tools	Use when
`core` (default)	8	Daily agentic use — lean context footprint
`admin`	26	Full Mistral API surface — embeddings, streaming, batch, classify, files, agents, TTS, document extraction. Best for debug, CI, scripts.
`workflows`	3	Pipeline orchestration only
`metier-docs`	9	Documents vertical — core + `process_document` macro-tool

full is accepted as a deprecated alias of admin for backward compatibility.

MISTRAL_MCP_PROFILE=admin npx mistral-mcp

Tools

Core profile (8 tools — always available)

Tool	What it does
`mistral_chat`	Chat completion. Supports all Mistral models, `response_format`, `reasoning_effort` for Magistral.
`mistral_vision`	Multimodal chat with images (URL or base64).
`mistral_ocr`	Document AI — extract text, bbox, and JSON annotations from PDFs/images.
`codestral_fim`	Fill-in-the-middle code completion (Codestral model).
`voxtral_transcribe`	Audio → text. Pass `diarize: true` for speaker separation.
`workflow_execute`	Start a Mistral Workflow (Temporal-backed durable execution).
`workflow_status`	Poll a running workflow — returns `RUNNING \| COMPLETED \| FAILED \| ...`.
`workflow_interact`	Signal / query a running workflow. Used for human-in-the-loop checkpoints.

Documents vertical (`MISTRAL_MCP_PROFILE=metier-docs`)

Tool	What it does
`process_document`	Single-call macro-tool: OCR → classify (kind=auto) → typed extraction → validation → cache. Kinds: `contract` / `invoice` / `id_document` / `generic`. Returns a discriminated union. PII-safe cache (id_document auto-bypass). Configurable `minOcrConfidence`.

Admin profile only (+18 tools, set `MISTRAL_MCP_PROFILE=admin`)

Group	Tools
Generation	`mistral_chat_stream`, `mistral_embed`, `mistral_tool_call`
Agents	`mistral_agent`, `mistral_moderate`, `mistral_classify`
Audio	`voxtral_speak` (TTS)
Files	`files_upload`, `files_list`, `files_get`, `files_delete`, `files_signed_url`
Batch	`batch_create`, `batch_get`, `batch_list`, `batch_cancel`
Sampling	`mcp_sample` (delegates generation to the MCP client's own model)

Resources

URI	What it returns
`mistral://models`	Live model catalog + accepted aliases
`mistral://voices`	Live Voxtral TTS voice catalog
`mistral://workflows`	Live list of deployed workflows (use `name` as `workflowIdentifier`)

Prompts

Curated prompts with structured arguments and MCP completion support:

Prompt	Input	Output
`french_meeting_minutes`	transcript text	Structured French meeting minutes
`french_email_reply`	received email + context	Polished French reply
`french_commit_message`	git diff	Conventional Commits message in French
`french_legal_summary`	legal document text	Plain-French summary + key clauses
`french_invoice_reminder`	debtor, amount, days overdue, tone	B2B dunning letter in French
`codestral_review`	git diff	Focused code review (security / logic / style)

Claude Code skills (11)

Install via the swih-plugins marketplace to get these namespaced skills:

Routing

/mistral-mcp:mistral-router — picks the right Mistral model + tool for any task

Code

/mistral-mcp:codestral-review — fetches the current diff, runs a focused review

French workflows

/mistral-mcp:french-commit-message — Conventional Commits message in French
/mistral-mcp:french-meeting-minutes — audio or text → structured French minutes
/mistral-mcp:french-invoice-reminder — B2B dunning letter with controlled tone

Document & audio processing

/mistral-mcp:contract-analyzer — OCR → risk-rated clause extraction (JSON)
/mistral-mcp:pdf-invoice-extractor — OCR → structured invoice fields for reconciliation
/mistral-mcp:audio-dispatch — transcribe + diarize → per-speaker action plan

Human-in-the-loop workflows

/mistral-mcp:contract-review-workflow — durable contract review with approval gates
/mistral-mcp:compliance-audit-workflow — multi-step audit with mid-run findings + decisions
/mistral-mcp:research-pipeline-workflow — hypothesis-driven research with amendment injection

Install

# Run directly (no global install)
npx mistral-mcp

# Global install
npm install -g mistral-mcp && mistral-mcp

# Docker
docker build -t mistral-mcp .
docker run -i --rm -e MISTRAL_API_KEY=your_key mistral-mcp

# From source
git clone https://github.com/Swih/mistral-mcp.git
cd mistral-mcp && npm install && npm run build
node dist/index.js

Transport

Mode	How to enable	Default
stdio	Default	`node dist/index.js`
Streamable HTTP	`MCP_TRANSPORT=http` or `--http` flag	`127.0.0.1:3333/mcp`

HTTP env vars: MCP_HTTP_HOST, MCP_HTTP_PORT, MCP_HTTP_PATH, MCP_HTTP_TOKEN (bearer auth), MCP_HTTP_ALLOWED_ORIGINS, MCP_HTTP_STATELESS=1.

/healthz is public and does not touch the MCP server.

Use as a Mistral Connector (beta)

mistral-mcp ships the Streamable HTTP transport and bearer auth that Mistral Connectors require. Deployment guides for Cloudflare Tunnel, Fly.io, and Render are in examples/deploy/README.md.

Surface	Status
Local MCP clients (Claude Code, Cursor, Zed, Windsurf, Claude Desktop)	Stable
Streamable HTTP transport + bearer auth	Tested locally (handshake + 401 + initialize verified)
Mistral Connector registration via `POST /v1/connectors`	Setup guide provided — Connectors are a beta feature, the API may change
Connector tool calls in Conversations/Agents	Untested end-to-end (requires public HTTPS deployment)
OAuth 2.1 Connector auth	Pending — bearer-only today

curl -X POST https://api.mistral.ai/v1/connectors \
  -H "Authorization: Bearer $MISTRAL_API_KEY" \
  -d '{"name":"mistral_self","server":"https://your-deploy/mcp","visibility":"private"}'

Mistral Connectors expose tools only today. Resources, prompts, sampling, and elicitation remain available via local clients.

Comparison with other Mistral MCP servers

Project	Scope	Best for
mistral-mcp	Full Mistral API + Workflows + 11 Claude Code skills	All-in-one self-hosted
`mcp-mistral-ocr` (community)	OCR only	Lightweight OCR-only setup
Speakeasy `mistral-mcp-server-example`	Generated demo	Reference / SDK template
Composio `mistral_ai` toolkit	SaaS-routed Mistral tools	Hosted, no infra

mistral-mcp differentiates by combining OCR, Voxtral diarization, Codestral FIM, and Temporal-backed Workflows in one server, with French-first prompts and a Claude Code plugin marketplace.

Development

npm run dev      # tsx watch
npm run build    # tsc → dist/
npm run lint     # tsc --noEmit
npm test         # 190+ tests (unit + contract + stdio e2e + live API)
npm run inspector

Test pyramid: unit → contract → stdio e2e → live API (requires MISTRAL_API_KEY).