Handwrytten
Sales outreachRobot-written cards and notes in real pen, ordered one at a time or in baskets through an API, with a Claude connector listed on its site. Business plans include API access.
MCPAPI/CLIFile import
Sales
Lob
Sales outreach Sales API/CLIFile import
Independent review. IonBin has no partnership with Lob and was not paid for this page. Our evaluation is our own, based on public documentation and our research. Product names are trademarks of their owners and are used for identification only. How disclosure works.
A print-and-mail API for letters, postcards, self-mailers and checks, with address verification. The Developer plan has no subscription fee; you pay print and postage per piece.
Best for
- Sending printed letters or postcards from your own app or agent
- Verifying mailing addresses before you send
Not for
- Handwritten-style notes
- Sending mail nobody has reviewed
Top use cases
- Create and send a printed letter through the API source ↗
- Send postcards and self-mailers source ↗
- Verify US addresses before mailing source ↗
In depth
Prepare, preview and send
Lob documents letters, postcards and self-mailers using HTML or PDF creative and recipient addresses. Campaigns accept a CSV audience and support proofs before ordering. The Campaigns API guide is labelled beta; verify its current status before building around it. Use a configured cancellation window, and approve the audience, creative and cost before sending. source ↗
Pricing
Developer has no platform subscription fee; Startup starts at $260/month and Growth at $550/month. Print, postage and applicable extras are charged separately from the subscription. The page's Developer volume of up to 6,000 is annual mailings, not a monthly allowance or free mail. Confirm billing term and format-specific rates; address-verification pricing is separate. Checked 2026-10-18. source ↗
Test keys versus live results
Test API calls can generate digital proofs without printing or posting mail, but they simulate address-verification behavior and do not verify real addresses. Use a live key for actual verification or mail. Keep secret keys on your server; live sends incur charges and must be reviewed before submission. source ↗
How to use it with AI
How Lob connects to each AI platform: native connector or MCP, API through code the agent writes, browser control, or file upload.
| Platform | MCP / connector | API (agent-written code) | Browser | Upload / export |
|---|---|---|---|---|
| Claude (incl. Claude Code) | Not documented Official MCP server availability has not been verified. | Not documented Claude (incl. Claude Code): Claude Code edits files and runs commands Lob publishes an API, but this pairing still needs network, authentication and execution-scope checks. Lob API ↗Claude (incl. Claude Code) docs ↗ | Inferred Claude Code with the Claude in Chrome extension (Chrome, Edge and other Chromium browsers). Lob is a web app; the pairing itself is not documented. Claude (incl. Claude Code) browser docs ↗ | Not documented Verify which side exports and which imports, supported formats and permissions. Lob's recorded upload/import status is yes; Claude (incl. Claude Code)'s file status is yes. These flags do not establish a file-transfer route. Lob file docs ↗Claude (incl. Claude Code) file docs ↗ |
| OpenAI Codex | Not documented Official MCP server availability has not been verified. | Not documented OpenAI Codex: Edits files and runs commands locally; cloud tasks run in isolated workspaces Lob publishes an API, but this pairing still needs network, authentication and execution-scope checks. Lob API ↗OpenAI Codex docs ↗ | Inferred Only in the ChatGPT desktop app; not in the Codex CLI or IDE extension. Lob is a web app; the pairing itself is not documented. OpenAI Codex browser docs ↗ | Not documented Verify which side exports and which imports, supported formats and permissions. Lob's recorded upload/import status is yes; OpenAI Codex's file status is yes. These flags do not establish a file-transfer route. Lob file docs ↗OpenAI Codex file docs ↗ |
| Google Antigravity | Not documented Official MCP server availability has not been verified. | Not documented Google Antigravity: Agents edit code and run tasks Lob publishes an API, but this pairing still needs network, authentication and execution-scope checks. Lob API ↗Google Antigravity docs ↗ | Inferred The /browser guide documents App and CLI support through Chrome DevTools MCP; the overview comparison conflicts on CLI availability. IDE browser features are separate. Lob is a web app; the pairing itself is not documented. Google Antigravity browser docs ↗ | Not documented Verify which side exports and which imports, supported formats and permissions. Lob's recorded upload/import status is yes; Google Antigravity's file status is yes. These flags do not establish a file-transfer route. Lob file docs ↗Google Antigravity file docs ↗ |
Confirmed is reserved for evidence of the specific connection route. The current named integrations include plugins, skills and CLIs, so a named platform alone does not confirm MCP or a native connector. Inferred means each side documents a relevant capability, but no document describes the pairing. Code execution still needs network and credential access; file handling still needs a compatible format and transfer direction. Not documented means the records do not establish the route. IonBin has not tested these pairings. Recorded Oct 18, 2026.
To verify Official MCP server availability is unverified. The main API reference could not be read during this audit; capabilities here are corroborated by Lob's help documentation.
Agent compatibility
API/CLIFile import MCP?
| Level | Status | Detail / source |
|---|---|---|
| Native connector / MCP | To verify | Official MCP server availability has not been verified. |
| API / CLI | Yes | Official docs ↗ |
| Browser / manual | No | Browser access is recorded alongside a documented programmatic route. |
| File upload / import | Yes | Official docs ↗ |
Recorded Oct 18, 2026. Setup and plan limits vary; check the vendor's docs. How levels are assigned.
Appears in these proposed stacks
Connection capabilities to compare
No confirmed MCP server yet.
Automation hubs to assess for a custom API connection: Gumloop, Make, n8n, Zapier. Verify credentials, supported requests, limits and error handling; no configured integration is implied.
Workflows using this tool
Review
No long-form review yet. Verdict is based on research, not hands-on testing.