Sendar

app.sendarPublished by sendar.appOfficial publisherv1.0.0Updated Oct 25, 2026

Sendar application email: inspect setup, preview, send and check delivery.

VerifiedStreamable HTTPWeb executableDeveloper ToolsCommunication & Collaboration

Overview

AI-generated overview

Sendar is a remote MCP server for application email: an assistant can inspect setup, preview messages, list domains, templates and emails, check delivery, and,

What you can do
Inspect account setup status and available sending domains and templates, and list previously sent emails with their statuses. Preview an email without sending it, and check the delivery status of an existing email. Send an email when the connection is permitted to do so, requiring task authorisation, an explicit confirmation flag and a stable idempotency key. Read-only access is the default; sending is an optional, bounded grant.
When to use it
Useful when an assistant should help with transactional or application email: drafting and previewing messages, checking whether a domain and template are set up, and reviewing delivery status. Sending is only worth enabling when you need an agent to trigger real emails within a verified domain and recipient limits.
Requirements
A remote Streamable HTTP endpoint with OAuth sign-in (S256 PKCE, dynamic public-client registration); no local package or runtime. Alternatively, an existing Sendar API key passed as an Authorization Bearer header for clients without OAuth support. A Sendar account with a verified sending domain for live sending.
Before you install
Sending is a real, irreversible action: it needs task authorisation, a confirmation flag and an idempotency key, and should not be retried with a new key after an uncertain outcome. OAuth connections are read-only by default, so grant sending deliberately and revoke connections when done. API keys carry their existing permissions and should be kept in a private secret store, never in checked-in configuration. A preview or mock is not a live-delivery test, and a sent status means provider accept

Installation

In SourceWeft

  1. Open Sendar in the dashboard and add it to a workspace.
  2. Connect the required credentials. They are stored privately and never shown on public pages.
  3. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/app.sendar%2Fmcp/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config. The client completes OAuth sign-in on first connect.

{
  "mcpServers": {
    "sendar": {
      "type": "http",
      "url": "https://sendar.app/api/mcp"
    }
  }
}

README

Sendar — Email for AI Agents

Portable skills and plugin manifests for integrating application email with Sendar.

Install skills

sh
npx skills add Thutos/sendar-agent-skills

Choose the agents and skills in the installer. Skills can write integration code without an account connection. Review files before installing third-party skills.

Replit

Import https://github.com/Thutos/sendar-agent-skills through + → Use a skill → GitHub import, preview and select the three skills. Or run in the project shell:

sh
npx skills add Thutos/sendar-agent-skills --agent replit

Files live in .agents/skills. Keep SENDAR_API_KEY in Replit Secrets and server-side code. Installing skills is separate from connecting an account or authorizing a send. Replit setup.

Windsurf / Devin Desktop

sh
npx skills add Thutos/sendar-agent-skills --agent windsurf

The installer uses .agents/skills with links under .windsurf/skills. Current Devin Desktop also discovers .agents/skills; .devin/skills is its preferred manual-install location. In Cascade, invoke @sendar-integrate, @sendar-delivery, or @sendar-migrate. Windsurf setup.

Both CLI installation layouts were tested in an isolated project on 30 September 2026, including supporting reference files. These are installation checks, not claims of end-to-end execution in Replit/Cascade or partner-directory approval.

Connect MCP

Remote endpoint: https://sendar.app/api/mcp (Streamable HTTP).

  • Claude Code: claude mcp add --transport http sendar https://sendar.app/api/mcp, then connect from /mcp.
  • Codex: codex mcp add sendar --url https://sendar.app/api/mcp, then codex mcp login sendar.
  • Cursor: merge configs/cursor.json into your MCP configuration; use the connection/authentication control.
  • VS Code/Copilot: merge configs/vscode.json into .vscode/mcp.json; start the server and follow authentication.
  • ChatGPT and Claude web: add the endpoint as a custom connector where your account supports it. Curated marketplace listing is separate and may require review.

OAuth uses S256 PKCE and dynamic public-client registration. During consent, read-only is the default; sending is optional and restricted to a verified domain, a daily recipient allowance and an optional recipient list. Revoke from https://sendar.app/agent-connections. Client names in consent are self-declared, not platform identity verification.

Existing API keys also work as an Authorization Bearer header, with their existing permissions. Keep them in a private environment/secret store, not checked-in configuration. Clients without OAuth support can use this path if they support secret headers.

Plugin packages

This repository contains Codex, Claude Code and Cursor manifests pointing to the same skills and MCP server. For Claude Code, add this repository as a plugin marketplace, then install sendar@sendar. Marketplace submissions are tracked separately; the existence of a manifest is not an endorsement or listing.

Tools

get_setup_status, preview_email, list_domains, list_templates, list_emails, get_email_status, and (when permitted) send_email.

Live sending needs task authorisation, confirmed: true, and a stable idempotency_key. Preview does not send. Do not retry an uncertain outcome with a new key. “Sent” means provider acceptance, not inbox delivery.

App builders

For Lovable, Replit, Bolt and v0, use https://sendar.app/ai and the server-side starters at https://github.com/Thutos/sendar-email-starters. Ask the builder to integrate the existing application event and store SENDAR_API_KEY in its private server environment. These recipes do not imply a native marketplace listing.

Compatibility and support

See https://sendar.app/ai for instructions and releases. Protocol/authentication tests are automated against a disposable database. Individual client sign-in and curated marketplace approval must be verified separately. Report integration issues through GitHub Issues without credentials, private recipients or message bodies.

Privacy: https://sendar.app/privacy · Terms: https://sendar.app/terms

Public agent reference

The public contract covers core email operations; it does not expose dashboard/admin APIs. REST API keys retain their existing permissions. MCP OAuth connections are read-only by default; optional sending requires a bounded grant. A successful mock or preview is not a live-delivery test. Documentation files assist integrations, not guaranteed search rankings or marketplace approval.

Source: README.md at commit 27d5971

Tools

0
This server asks you to sign in, so SourceWeft could not read its tools without an account and has not indexed them. What a connected account sees can depend on that account and its permissions.

Version history

1
  1. v1.0.0LatestSep 30, 2026

Score

85% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts