Developer
Connect Postal
Self-hosted open-source mail delivery platform with a REST API for incoming and outgoing email.
Developer
Postal
Self-hosted open-source mail delivery platform with a REST API for incoming and outgoing email.
API keyScoped proxy
Connect with a provider API key
The client enters their provider key in the hosted connect flow. CybrLink stores it in the credential layer, then agents call through scoped MCP/API access without seeing the raw secret.
Where to get your Postal API keyStep 1
Open the portal connect flow
Step 2
Enter the provider API key
Step 3
Create a scoped MCP/API key
Sample request
// 1. Mint a session token for the end user
const session = await link.connect.session({
integrationKey: "postal",
userId: "u_42",
});
// 2. After the user enters their provider API key, proxy a request
const res = await link.proxy("postal", "u_42", {
method: "GET",
endpoint: "/api/v1/me",
});More in this category
Postal + AI agents: common questions
- How do I connect Postal to an AI agent?
- Create a free CybrLink account, open the dashboard, and click Connect on Postal. You authorize once with an API key; CybrLink stores the credential in its token vault and your agent reaches Postal through the CybrLink MCP server or the agent proxy API. The credential itself is never placed in the model's context.
- Does Postal work with Claude, GPT, and other MCP clients?
- Yes. CybrLink exposes a remote MCP (Model Context Protocol) server, so any MCP-capable client or agent framework — including Claude, OpenAI-based agents, and custom agents — can call Postal once you've connected it. Non-MCP agents can use the authenticated HTTP proxy instead.
- Is it safe to give an AI agent access to Postal?
- CybrLink scopes every connection to the permissions you grant, keeps tokens out of the model, logs each call to an activity audit trail, and lets you revoke the Postal connection at any time from the dashboard.