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simhook
What simhook is
simhook turns an Android phone with a SIM into an SMS gateway and API for sending and receiving texts. API messages go through the paired phone's SIM, while incoming messages can be forwarded to an account as webhooks. Signed webhooks report sent, delivered, and failed states; they are retried for two days and paused if the endpoint continues failing. The service supports scheduled sends, multiple recipients, and dual-SIM phones, with a SIM selectable per message. A TypeScript SDK supports Node and edge runtimes, and the MCP server provides eight tools for AI agents. API keys can be scoped, including a send-only option. The Android app requires version 8.0 or newer and is distributed as a signed APK. The full stack can be self-hosted from one Compose file under AGPL-3.0; the maker says self-hosting is free without limits. Hosted Free accounts allow 30 messages a day and 500 a month, one phone, and 25 recipients per send. Paid plans are listed from $12 per month, but the maker says they are not yet open and every account remains on Free. The maker says the service is not for bulk marketing or messaging people who have not asked to hear from you.
Who it suits
simhook suits developers or teams seeking to send and receive SMS through an Android phone, including through its API or integrations. Its maker advises using a business SIM for real volume and says it is not for bulk marketing or unsolicited messages.
What it does well
- Supports inbound and outbound SMS.
- Signed webhooks report delivery states.
- Dual-SIM phones and per-message SIM selection are supported.
- Self-hosting is free with no limits, according to the maker.
- API keys can be restricted to send-only.
What to know first
- Android 8.0 or newer is required.
- Hosted Free is limited to 500 messages a month.
- Paid plans are listed but not yet open.
- Free plan allows one phone.
Limits
Hosted Free allows 30 messages a day and 500 a month, one phone, and up to 25 recipients per send. Listed Pro costs $12 a month and allows 10,000 messages monthly, three phones, and 500 recipients per send; paid access is not open yet, and accounts remain on Free. The maker says self-hosting is free with no limits.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | 30 messages a day · 500 a month · 1 phone · 25 recipients per send | Free |
| Self-hosted | free · Whole stack · no limits of any kind | Free |
| Pro | $12 / month, or $120 / year · 10,000 messages a month · 3 phones · 500 recipients per send | $12 a month |
| Pro (annual) | $120 / year · 10,000 messages a month · 3 phones · 500 recipients per send | $120 a year |
| Scale | $39 / month, or $390 / year · 50,000 messages a month · 10 phones · 2,500 recipients per send | $39 a month |
| Scale (annual) | $390 / year · 50,000 messages a month · 10 phones · 2,500 recipients per send | $390 a year |
As simhook.dev lists them, read 2 Oct 2026. The maker's own page has the final word.
Getting started
- Visit https://simhook.dev/ and create an account for hosted access.
- Install the signed APK on a phone running Android 8.0 or newer.
- Pair the phone and its SIM with the account.
- Create an API key with the scopes required for your use; send-only access is available.
- For self-hosting, use the Compose file for the AGPL-3.0 full stack.
- Use the TypeScript SDK or MCP server if they suit your integration; setup guidance covers Claude Desktop, Cursor, and Claude Code.
Verdict
simhook routes API messaging through an Android phone's SIM and offers a no-limit self-hosted option. Hosted accounts currently remain on Free, so paid plan limits are not yet available to users.
Questions
Is simhook free?
The hosted Free plan is listed at 0.00 USD and allows 30 messages a day and 500 a month. Self-hosting is also listed at 0.00 USD, and the maker says it has no limits.
What do the paid plans cost?
Pro is listed at $12 a month, or $120 a year. Scale is $39 a month, or $390 a year. The maker says paid plans will open soon, so every account remains on Free for now.
Which platforms does simhook support?
The listed platforms are Android, API, self-hosted, and web. The Android app requires Android 8.0 or newer and is distributed as a signed APK.
Can simhook receive texts and report delivery?
Yes. Incoming texts can be forwarded to the account as webhooks, and signed webhooks report sent, delivered, and failed states.
Can I self-host simhook?
Yes. The full stack can be self-hosted from one Compose file under AGPL-3.0. The maker says self-hosting is free with no limits.
Who makes simhook, and what integrations are available?
The maker’s name is not given in these product details. The TypeScript SDK supports Node and edge runtimes, and an MCP server provides eight tools for AI agents; setup guidance covers Claude Desktop, Cursor, and Claude Code.
Facts from simhook's own pages
- Android requirements
- The app works on Android 8.0 or newer, is distributed as a signed APK, and updates itself after the user approves installation. · simhook.dev, 2 Oct 2026
- API keys
- API keys can have send, read, devices, and webhooks scopes, and a send-only key can send without other access. · simhook.dev, 2 Oct 2026
- Delivery tracking
- The service reports sent, delivered, and failed state changes through signed webhooks. · simhook.dev, 2 Oct 2026
- Dual SIM
- Dual-SIM phones are supported, and a SIM can be selected per message. · simhook.dev, 2 Oct 2026
- Founded
- 2026 · simhook.dev, 28 Sept 2026
- Hosting and data
- The hosted service runs on Hetzner servers behind Cloudflare, with nightly database dumps; Firebase Cloud Messaging pushes contain no message content. · simhook.dev, 2 Oct 2026
- Integrations
- The TypeScript SDK supports Node and edge runtimes, and the MCP server provides eight tools for AI agents; the maker documents setup for Claude Desktop, Cursor, and Claude Code. · simhook.dev, 2 Oct 2026
- Intended audience and limits
- The maker says SimHook is not for bulk marketing or texting people who did not ask to hear from you, and advises using a business SIM for real volume. · simhook.dev, 2 Oct 2026
- Message routing
- Messages sent through the API go out through the paired phone's SIM, and received texts can be forwarded to the account as webhooks. · simhook.dev, 2 Oct 2026
- Paid plan availability
- Paid plans are listed, but the maker says they open soon and every account is on Free until then. · simhook.dev, 2 Oct 2026
- Product
- SimHook turns an Android phone with a SIM into an SMS gateway and API for sending and receiving texts. · simhook.dev, 2 Oct 2026
- Scheduling and batches
- The product supports scheduled sends and sending to multiple recipients, with pricing limits of up to 2,500 recipients per send on Scale. · simhook.dev, 2 Oct 2026
- Self-hosting
- The full stack can be self-hosted from one Compose file under AGPL-3.0, and the maker says self-hosting is free with no limits. · simhook.dev, 2 Oct 2026
- Webhook behavior
- Signed webhooks are retried for two days and paused when the endpoint keeps failing. · simhook.dev, 2 Oct 2026
Where simhook stands on Freedom251
- SMS Gateway Software#9 of 36