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Velocity2.5

Transactional email delivery service

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Postmark ships Skills for AI coding agents and an async-first Python SDK — leaning into the agent-built-app era.

transactional-emaildeveloper-toolsai-coding-agentsagent-skillspython-sdkbulk-email
◆Current state
Postmark released two coordinated developer-platform moves. First, an open-source set of 'Postmark Skills' designed to teach AI coding agents — Claude Code, Cursor, GitHub Copilot, OpenAI Codex, Gemini CLI — accurate Postmark API context, covering send/batch/bulk, inbound, templates, webhooks, and message streams. Second, an official Python SDK built async-first, with split ServerClient and AccountClient surfaces and Python 3.10+ support. Around these, the team is highlighting bulk email send capabilities and routine maintenance (Axios 1.13.5 in the JS SDK).
◆Where it's heading
Postmark is positioning for a market where AI agents are the integrators, not just human developers. The Skills release is a direct response to the failure mode the team itself names — agents writing 'code that looks right but isn't' against transactional-email APIs. By shipping curated context as an open standard, Postmark stakes out the ground that whoever feeds correct knowledge into agent toolchains earns the integration calls. The async-first Python SDK fits the same thesis: agents and modern Python apps both want non-blocking calls by default.
◆Prediction
Expect Postmark Skills to expand to inbound parsing and event-driven flows, and the open-standard framing to invite peer ESPs (Resend, Loops, Customer.io transactional) to publish their own Skills — at which point the question becomes whose Skills agents actually reach for. Watch for an MCP server next; it's the natural pairing with Skills for runtime tool calls.

◆Recent moves

  1. 1mo ago

    Python SDK now available

    An official async-first Python SDK lands, with separate ServerClient (sending, bounces, templates, webhooks, streams) and AccountClient (domains, signatures, servers, data removals) surfaces. Closes a long-standing gap for Python developers and matches the async patterns most modern Python apps already use.

    View source ↗
  2. 2mo ago

    Python SDK details (docs duplicate)

    Wiki-page text describing the same Python SDK release as the April 30 entry — Python 3.10+ support and the two-client split. Documentation snapshot rather than a distinct change.

    View source ↗
  3. 2mo ago

    Free trial signup page (feed artifact)

    Cookie banner and 'Start free trial' boilerplate from the signup page. Pure feed-source artifact — the crawler captured account.postmarkapp.com instead of a release post.

    View source ↗
  4. 3mo ago

    Bulk email docs page (feed artifact)

    Bulk-email API documentation page captured as a release entry — sidebar nav text rather than a release announcement. The bulk-email capability itself shows up in another entry with cleaner content.

    View source ↗
  5. 3mo ago

    Postmark Skills: open-source Agent Skills for AI coding agents

    ⚡ SPARK

    Postmark Skills launches as an open-source set of Agent Skills for Claude Code, Cursor, GitHub Copilot, OpenAI Codex, and Gemini CLI — giving AI coding agents accurate Postmark API context instead of guessed endpoints and hallucinated methods. The framing positions Postmark as one of the first transactional-email providers to treat the agent toolchain as a primary distribution channel.

    View source ↗
  6. 3mo ago

    Five Skills shipped under the open Agent Skills standard

    Detail entry enumerating the five Skills shipped: postmark-send-email, plus inbound, template, webhook, and streams capabilities, all distributed under the open Agent Skills standard. Companion to the higher-level Postmark Skills launch.

    View source ↗