@atomicmail/agentic-core

Shared Atomic Mail runtime for integrations — PoW auth, JMAP batch execution, presets, and help topics.

Use this package when building connectors (Activepieces, custom hosts) instead of shelling out to MCP or AgentSkill.

Install

npm install @atomicmail/agentic-core

Quick start

import {
  createAgentSessionFromKeyValue,
  runJmapRequest,
  getHelp,
} from "@atomicmail/agentic-core";

const session = await createAgentSessionFromKeyValue({
  storage: myHostKeyValueStore,
  accountId: "default",
  apiKey: process.env.ATOMIC_MAIL_API_KEY,
});

const result = await session.register("myagent01");
// result.apiKey — present on first signup

const jmap = await runJmapRequest({
  session,
  opsJson: await Deno.readTextFile("presets/list_inbox.json"),
  defaultUsing: ["urn:ietf:params:jmap:core", "urn:ietf:params:jmap:mail"],
  sourceLabel: "list_inbox.json",
});

const help = await getHelp("presets");

Key exports

• AgentSession — register, JWT refresh, JMAP session cache
• runJmapRequest — preset/ops execution with $VAR substitution and attachments
• getHelp, HELP_TOPIC_LIST — runtime help topics
• KeyValueCredentialStore — persist credentials in host storage (Activepieces Store, etc.)
• createAgentSession, createAgentSessionFromKeyValue — integration session factory

Bundled assets: shared/ presets and help topics, presets/ JMAP JSON files.

PoW / timeout guidance for integration hosts

• Run PoW in flow actions (register, jmap_request), not in connection validate().
• Cache session JWTs in host storage; PoW re-runs only when JWT expires (~1h).
• Do not use sync webhooks for register or other PoW-heavy steps.

See the Atomic Mail Agentic repo for full integration guidelines.