lob-mcp (optimize-overseas/lob-mcp) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 77 tools. No publisher has claimed this listing.

Back to MCP Trust IndexM8ven
C
Emerging
74/100

lob-mcp

A Model Context Protocol server that enables LLMs to interact with the Lob.com API for address verification and sending physical mail. It provides 76 tools across 12 resource groups including postcards, letters, checks, and templates with built-in safety features for production use.

→ optimize-overseas/lob-mcp· listed on glama

Emerging. No concerning findings. Grades remain capped until the project builds reputation through adoption. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

⚡ Live Monitored: not connected

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Who stands behind it

optimize-overseas

Source: Glama

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Install from

Glamanot scored here

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
🔐
You'll be asked for 3 credentials: LOB_API_KEY, LOB_LIVE_API_KEY, LOB_TEST_API_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
🔐 secretLOB_API_KEY
configLOB_API_VERSION_(account default)_ Pin a specific Lob API version via the Lob-Version header (e.g. 2020-02-11).
configLOB_BASE_URL
configLOB_CONFIRMATION_TTL_SECONDS600 How long a preview's confirmation_token stays valid.
🔐 secretLOB_LIVE_API_KEYNo Lob live_… key. Used for live-account work — see Modes below.
configLOB_LIVE_MODEcommit the 6 billable _create (postcards, letters, self-mailers, checks, buckslip/card orders) gate: test unless LOB_LIVE_MODE=true + a live key. In test mode it runs as a $0 test send.
configLOB_MAX_PIECES_PER_RUNExact piece-count cap via . Hard ceiling, not estimate.
configLOB_READS_USE_TESTForce test reads ✅ ✅ any + =true → reads on test regardless.
configLOB_REQUEST_TIMEOUT_MS
configLOB_REQUIRE_CONFIRMATIONtrue When true, live-mode commits require a confirmation_token from the matching _preview tool. Set to false to skip the gate (loses payload-binding safety).
configLOB_REQUIRE_ELICITATION_FOR_BULK_OVER_PIECES_(unset)_ If set, fires elicitation when a buckslip or card inventory order's quantity exceeds this threshold.
configLOB_REQUIRE_ELICITATION_FOR_CHECKS_OVER_USD_(unset)_ If set, fires an MCP elicitation form when a check amount exceeds this threshold. The form must be confirmed before the send.
🔐 secretLOB_TEST_API_KEYYes Lob test_… key. Used for previews via /resource_proofs and as the fallback for everything when no live key is configured.
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

77/77 tools missing one or more hints — lob_addresses_create (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); lob_addresses_list (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); lob_addresses_get (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +74 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tool test coverage

Only 9/77 tools referenced in tests (12%)

Write tests that reference each tool by name so every tool has at least one test.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 3 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/optimize-overseas/lob-mcp)](https://m8ven.ai/mcp/optimize-overseas/lob-mcp)
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commit: 61f30b0101dad4640f79b3b8beafa128c322fb64
code hash: a621c7378536a3e6b2fa5ddc93c929dadfc2a70d9ffc835eb399edab1f8a9a28
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