# Nodium

> Connected in minutes. Nodium carries the messages, you decide. Connect your WhatsApp number or your clients' numbers through Meta's official API: REST, SDK, signed webhooks, templates, Flows, broadcasts. Free to start.

Nodium is published by By-Tech.io (Paris, France). Contact: contact@nodium.io

## Pricing

- Build — €0 forever: Your WhatsApp number, connected by you. No card.
  - 3,000 messages a month
  - 1 WhatsApp number, connected in two minutes
  - 1 GB of media, 7 days of retention
  - The whole API, the console and the journal
  - Signed webhooks, templates, Flows and broadcasts
  - Beyond that: Launch, €19 a month
- Launch — €19 per month: Connect your clients' numbers, each through its own link. Everything included on Nodium's side.
  - 100,000 messages a month
  - 3 numbers included, €8 per extra number
  - 20 GB of media, 30 days of retention
  - Unlimited clients, one connect link each
  - Beyond the quota: €1 per 1,000 messages, up to the cap you set
- Scale — €249 per month: For a fleet of clients, with priority email support.
  - 1,000,000 messages a month
  - 50 numbers included, €4 per extra number
  - 200 GB of media, 90 days of retention
  - Beyond the quota: €0.50 per 1,000 messages
- Moving from Build to Launch changes nothing in your code: same key, same webhooks. Meta bills its fees separately, per number.
- Details: https://nodium.io/en/pricing

## Pages (English)

- [WhatsApp API for developers and SaaS platforms — Nodium](https://nodium.io/en/home): Connect your WhatsApp number or your clients' numbers through Meta's official API: REST, SDK, signed webhooks, templates, Flows, broadcasts. Free to start.
- [WhatsApp Cloud API for developers, multi-client — Nodium](https://nodium.io/en/whatsapp-api): Connect your customers' WhatsApp numbers and send and receive over REST: templates per customer, the 24-hour window handled, broadcasts, signed webhooks.
- [WhatsApp Business API gateway: webhooks, templates — Nodium](https://nodium.io/en/product): Meta's official WhatsApp Cloud API with signed webhooks, templates, Flows and broadcasts, plus a REST API and a TypeScript SDK to send and receive from your code.
- [WhatsApp API for SaaS, agencies and product teams — Nodium](https://nodium.io/en/use-cases): Software publishers connecting their customers' WhatsApp, agencies delivering for theirs, product teams adding WhatsApp to their app.
- [WhatsApp API pricing: free plan, then from €19 — Nodium](https://nodium.io/en/pricing): Build is free forever: 3,000 messages and 1 number. Launch from €19 a month, Scale from €249. Meta bills its fees per number, with no markup from Nodium.
- [WhatsApp REST API, OpenAPI and webhooks — Nodium](https://nodium.io/en/api): A REST API under /api/v1: a data envelope, stable error codes, signed webhooks, multi-client keys, OpenAPI 3.1, a TypeScript SDK and llms.txt.
- [WhatsApp API for AI agents: llms.txt, AGENTS.md — Nodium](https://nodium.io/en/agents): Claude Code, Cursor, Codex: your coding agent reads Nodium as plain text. llms.txt, AGENTS.md, OpenAPI and a ready-to-paste prompt to connect WhatsApp.
- [Security and GDPR: encrypted, isolated, EU-hosted — Nodium](https://nodium.io/en/security): Secrets encrypted with AES-256-GCM, signed webhooks, per-client isolation, configurable retention, erasure by API, hosting in the European Union.
- [Contact the Nodium team — WhatsApp API](https://nodium.io/en/contact): Write to the Nodium team about a WhatsApp API integration, a custom plan or your data.
- [Mentions légales — Nodium](https://nodium.io/en/legal/notice): Éditeur, directeur de la publication, hébergement et propriété intellectuelle du site Nodium.
- [Terms of Service — Nodium](https://nodium.io/en/legal/terms): The terms of use of Nodium, the API gateway to WhatsApp and Muse: account and keys, responsibility for content, channel fees, data processing.
- [Privacy — Nodium](https://nodium.io/en/legal/privacy): What data Nodium processes, why, with which providers, for how long, and how to exercise your rights.

## Pages (français)

- [API WhatsApp pour développeurs et éditeurs SaaS — Nodium](https://nodium.io/fr/home): Branchez votre numéro WhatsApp ou ceux de vos clients par l'API officielle de Meta : REST, SDK, webhooks signés, modèles, Flows, diffusions. Gratuit pour démarrer.
- [API WhatsApp Cloud pour développeurs, multi-clients — Nodium](https://nodium.io/fr/whatsapp-api): Branchez le WhatsApp de vos clients, envoyez et recevez par une API REST : modèles par client, fenêtre de 24 heures tenue, diffusions, webhooks signés.
- [Passerelle API WhatsApp Business : webhooks, modèles — Nodium](https://nodium.io/fr/product): L'API WhatsApp Cloud officielle de Meta, avec webhooks signés, modèles, Flows et diffusions, une API REST et un SDK TypeScript pour envoyer et recevoir.
- [API WhatsApp pour éditeurs SaaS, agences et produits — Nodium](https://nodium.io/fr/use-cases): Éditeurs qui branchent le WhatsApp de leurs clients, agences qui livrent pour les leurs, équipes produit qui ajoutent WhatsApp à leur application.
- [Tarifs de l'API WhatsApp : gratuit, puis dès 19 € — Nodium](https://nodium.io/fr/pricing): Build gratuit pour toujours : 3 000 messages et 1 numéro. Launch dès 19 € par mois, Scale dès 249 €. Meta facture ses frais par numéro, sans marge de Nodium.
- [API REST WhatsApp, OpenAPI et webhooks — Nodium](https://nodium.io/fr/api): Une API REST sous /api/v1 : enveloppe data, codes d'erreur stables, webhooks signés, clés multi-clients, OpenAPI 3.1, SDK TypeScript et llms.txt.
- [API WhatsApp pour agents IA : llms.txt, AGENTS.md — Nodium](https://nodium.io/fr/agents): Claude Code, Cursor, Codex : votre agent de code lit Nodium en texte simple. llms.txt, AGENTS.md, OpenAPI et le prompt prêt à copier pour brancher WhatsApp.
- [Sécurité et RGPD : chiffré, cloisonné, hébergé en UE — Nodium](https://nodium.io/fr/security): Secrets chiffrés en AES-256-GCM, webhooks signés, cloisonnement par client, conservation paramétrable, effacement par l'API, hébergement dans l'Union européenne.
- [Contacter l'équipe Nodium — API WhatsApp](https://nodium.io/fr/contact): Écrivez à l'équipe Nodium : une intégration de l'API WhatsApp, une offre sur mesure, vos données.
- [Mentions légales — Nodium](https://nodium.io/fr/legal/notice): Éditeur, directeur de la publication, hébergement et propriété intellectuelle du site Nodium.
- [Conditions d'utilisation — Nodium](https://nodium.io/fr/legal/terms): Les conditions d'utilisation de Nodium, passerelle API vers WhatsApp et Muse : compte et clés, responsabilité du contenu, frais de canal, sous-traitance des données.
- [Confidentialité — Nodium](https://nodium.io/fr/legal/privacy): Quelles données Nodium traite, pourquoi, avec quels prestataires, combien de temps, et comment exercer vos droits.

## Developers

- [For AI agents](https://nodium.io/en/agents): how a coding agent integrates Nodium, the prompt to give it
- [AGENTS.md](https://nodium.io/agents.md): the integration sheet for coding agents, in one file
- [Full text for LLMs](https://nodium.io/llms-full.txt): this summary, AGENTS.md and the whole API guide
- [API documentation](https://nodium.io/en/docs/api): guide and reference, in English
- [API for LLMs](https://nodium.io/docs/api/llms.txt): every published route, in one file
- [OpenAPI](https://nodium.io/docs/api/openapi.json): the machine-readable description
- [Webhook events](https://nodium.io/docs/api/webhook-events.json): fields and an example of each event
- [Status](https://nodium.io/status.json): the state of the API, machine-readable
- TypeScript SDK: `npm i @nodium.io/whatsapp` · CLI: `npx @nodium.io/cli`
- MCP server: https://nodium.io/api/v1/mcp — operate WhatsApp from an agent with your API key (guide: https://nodium.io/en/docs/api/guide/mcp)

REST base URL: `https://nodium.io/api/v1` (Bearer API key, `{ data }` / `{ error }` envelope). One key per account acts for every client: the optional `Nodium-Tenant` header names the client, by id or by your own `externalId`. Each client links its own WhatsApp number through a hosted connect link (`POST /api/v1/tenants/{id}/connect-links`). A WhatsApp number is required, yours or your customer's: Nodium does not provide numbers. Rate limit: 600 calls per minute per client (per key when pinned), 6,000 per key. API key roles: admin, agent (send-only), member (read-only). Webhooks are signed with HMAC-SHA256 (`X-Nodium-Signature`), one subscription for all clients. Each app is published as a hosted MCP server for Muse at `/api/v1/apps/{id}/mcp`, with OAuth 2.1 handled by Nodium. Nodium never answers for you: it carries messages and tool calls, your code decides the reply.