Lob MCP by usefulapi

io.usefulapi由 usefulapi.io 发布官方发布者v1.37.5更新于 Nov 8, 2026

Verify US & international addresses and send physical mail (postcards, letters, checks) via Lob.

发布方自己的服务：Ably MCP by usefulapi

已验证Streamable HTTP可网页运行位置与生活商业与电商

概览

AI 生成的概览

托管的 Lob 服务器，让助手校验美国及国际地址，并寄送、查询实体明信片、信件和支票。

可以做什么
  • 校验并标准化美国与国际地址，查询美国邮编对应城市，补全不完整的美国地址
  • 列出并查看明信片、信件、支票、自邮寄件、已保存地址和模板
  • 创建可复用的地址记录，作为寄件人或收件人
  • 寄送真实明信片和信件，并在寄送日期前取消已排期的明信片
  • 查看本月工具调用用量、提交功能请求，以及管理或取消付费套餐
适用场景
适合涉及实体邮件或地址数据的工作：判断地址是否可投递、清洗地址列表，或在对话中寄送并跟踪明信片和信件。
运行要求
通过 streamable HTTP 连接远程端点 lob.usefulapi.io，无需本地安装。配置时只填 URL，通过 OAuth 登录，首次连接时粘贴 Lob API 密钥。需要 Lob 账户；该服务器自带免费额度，每月 50 次工具调用。
安装前请注意
服务器会按用户保存你的 Lob API 密钥。寄送明信片或信件会真实投递并计入 Lob 账户费用，使用 test 密钥可避免真实寄送和扣费。仅在寄送日期前可取消。付费套餐通过 Stripe 结账链接付款，取消后当期不退款。

安装

在 SourceWeft 中

  1. 打开 控制台中的 Lob MCP by usefulapi，将其添加到工作区。
  2. 为需要使用其工具的对话启用该服务。

Web executable，通过 Streamable HTTP。 远程服务在工作区中配置后即可从网页运行时运行。

交给智能体安装

把这段提示词粘贴到 Claude Code、Codex、Cursor 等智能体，或 SourceWeft 对话中。智能体会读取该服务器的安装指南，先向你展示发布者、端点和登录方式，经你同意后再把它添加到你的客户端。密钥不会写进任何命令。

阅读 https://sourceweft.com/mcp/io.usefulapi%2Flob/install.md，并按其中说明把这个 MCP 服务器接入我的客户端。修改任何配置之前，先告诉我它的发布者、端点和登录方式，等我确认。不要把 API 密钥写进命令或我会提交的文件；问我密钥应从哪里获取。

查看智能体所依据的安装指南

其他 MCP 客户端

把它添加到你客户端的 mcpServers 配置中。

{
  "mcpServers": {
    "lob-by-usefulapi": {
      "type": "http",
      "url": "https://lob.usefulapi.io/mcp"
    }
  }
}

README

Lob MCP by usefulapi

Verify addresses and send physical mail via Lob, from Claude, Cursor, or any MCP client. Hosted, no local install — connect with your Lob API key.

Live endpoint: https://lob.usefulapi.io/mcp · Homepage: https://usefulapi.io/lob

Connect

  • Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://lob.usefulapi.io/mcp.
  • Claude Code: claude mcp add --transport http lob https://lob.usefulapi.io/mcp, then run /mcp to log in.
  • VS Code: Add to VS Code.
  • Cursor and other clients: add the URL as a remote MCP server:
json
{  "mcpServers": {    "lob": {      "url": "https://lob.usefulapi.io/mcp"    }  }}

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your Lob credentials.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/lob/

On first connect you'll paste your Lob API key. It's validated, stored per-user, and scoped to you.

Tools

ToolTypeWhat it does
lob_verify_us_addressreadVerify a US address
lob_verify_intl_addressreadVerify an international address
lob_us_zip_lookupreadLook up a US ZIP code
lob_us_autocompletereadAutocomplete a US address
lob_list_postcardsreadList postcards
lob_get_postcardreadGet a postcard
lob_list_lettersreadList letters
lob_get_letterreadGet a letter
lob_list_checksreadList checks
lob_get_checkreadGet a check
lob_list_self_mailersreadList self-mailers
lob_list_addressesreadList saved addresses
lob_get_addressreadGet a saved address
lob_list_templatesreadList templates
lob_create_addresswriteSave an address record
lob_create_postcardwriteSend a postcard (COSTS MONEY)
lob_create_letterwriteSend a letter (COSTS MONEY)
lob_cancel_postcardwriteCancel a scheduled postcard
lob_usage_statusmetaUsage status (free-tier meter)
lob_request_featuremetaRequest a missing feature
lob_upgrademetaUpgrade to Pro or Pro+
lob_cancel_subscriptionmetaCancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

PlanPriceLimit
Free$050 tool calls / month
Pro$9/mo or $90/yr (2 months free)Unlimited*

*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to [email protected].

Pro covers this server only. Subscribe with lob_upgrade (it returns a Stripe Checkout link). Cancel any time with lob_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running lob_upgrade before then undoes the cancel. Or write to [email protected].

License

MIT — see LICENSE. Documentation only; the server is hosted.

来源：servers/lob/README.md，提交 4046075

工具

18

lob_verify_us_address

Verify a US address

Validate & standardize a US address, returning deliverability, corrected components, and a confidence score. Pass either a single freeform `address` string OR structured `primary_line`/`city`/`state`/`zip_code`. Non-mutating (no mail sent). Lob API: POST /v1/us_verifications.

输入参数citystateaddresszip_codeprimary_linesecondary_line

lob_verify_intl_address

Verify an international address

Validate & standardize a non-US address. `country` (2-letter ISO code) is required. Non-mutating (no mail sent). Lob API: POST /v1/intl_verifications.

输入参数citystatecountry必填postal_codeprimary_line必填secondary_line

lob_us_zip_lookup

Look up a US ZIP code

Return the cities and state associated with a US ZIP code. Non-mutating. Lob API: POST /v1/us_zip_lookups.

输入参数zip_code必填

lob_us_autocomplete

Autocomplete a US address

Suggest complete US addresses from a partial primary line — useful for address entry. Non-mutating. Lob API: POST /v1/us_autocompletions.

输入参数citystatezip_codeaddress_prefix必填

lob_list_postcards

List postcards

List sent/scheduled postcards, newest first. Lob API: GET /v1/postcards.

输入参数afterlimitbefore

lob_get_postcard

Get a postcard

Retrieve a single postcard by id, including status, PDF url, and expected delivery. Lob API: GET /v1/postcards/{id}.

输入参数id必填

lob_list_letters

List letters

List sent/scheduled letters, newest first. Lob API: GET /v1/letters.

输入参数afterlimitbefore

lob_get_letter

Get a letter

Retrieve a single letter by id, including status, PDF url, and tracking. Lob API: GET /v1/letters/{id}.

输入参数id必填

lob_list_checks

List checks

List sent/scheduled checks, newest first. Lob API: GET /v1/checks.

输入参数afterlimitbefore

lob_get_check

Get a check

Retrieve a single check by id, including amount, status, and check number. Lob API: GET /v1/checks/{id}.

输入参数id必填

lob_list_self_mailers

List self-mailers

List sent/scheduled self-mailers, newest first. Lob API: GET /v1/self_mailers.

输入参数afterlimitbefore

lob_list_addresses

List saved addresses

List saved address records, newest first. Lob API: GET /v1/addresses.

输入参数afterlimitbefore

lob_get_address

Get a saved address

Retrieve a single saved address record by id. Lob API: GET /v1/addresses/{id}.

输入参数id必填

lob_list_templates

List templates

List saved HTML templates usable as postcard/letter artwork. Lob API: GET /v1/templates.

输入参数afterlimitbefore

lob_create_address

Save an address record

Create a reusable saved address record (does NOT send any mail). Returns an address id (adr_…) usable as `to`/`from` in mail tools. Lob API: POST /v1/addresses.

输入参数namecompanyaddress_zipdescriptionaddress_cityaddress_line1必填address_line2address_stateaddress_country

lob_create_postcard

Send a postcard (COSTS MONEY)

⚠️ SENDS A REAL POSTCARD and charges your Lob account (use a test_ key to avoid real mail/charges). `to` and `from` accept an existing address id (adr_…) or an inline address object. `front`/`back` accept an HTML string, a hosted asset URL, or a template id (tmpl_…). Cancelable only before `send_date`. Lob API: POST /v1/postcards.

输入参数to必填back必填fromsizefront必填use_typemail_typesend_datedescriptionmerge_variables

lob_create_letter

Send a letter (COSTS MONEY)

⚠️ SENDS A REAL LETTER and charges your Lob account (use a test_ key to avoid real mail/charges). `to`/`from` accept an address id (adr_…) or inline object. `file` accepts an HTML string, a hosted PDF/URL, or a template id (tmpl_…). `color` is required. Cancelable only before `send_date`. Tracked mail: `extra_service` = certified (U.S. addresses: tracking + proof of delivery), certified_return_receipt (certified + the recipient's electronic signature) or registered (international addresses only); extra cost, first class only, not for us_legal size. The tracking number is on the letter (lob_get_letter). Lob API: POST /v1/letters.

输入参数to必填file必填from必填color必填use_typemail_typesend_datedescriptiondouble_sidedextra_servicemerge_variablesaddress_placement

lob_cancel_postcard

Cancel a scheduled postcard

Cancel a postcard before its send_date so it is never mailed (and not billed). Fails if the send window has passed. Lob API: DELETE /v1/postcards/{id}.

输入参数id必填

版本历史

21
  1. v1.37.4Nov 7, 2026
  2. v1.36.3Nov 5, 2026
  3. v1.36.2Nov 5, 2026
  4. v1.36.1Nov 4, 2026
  5. v1.36.0Nov 3, 2026
  6. v1.35.1Nov 3, 2026
  7. v1.34.0Nov 1, 2026
  8. v1.32.0Oct 31, 2026
  9. v1.31.0Oct 31, 2026
  10. v1.30.2Oct 30, 2026
  11. v1.30.0Oct 30, 2026
  12. v1.24.0Oct 26, 2026
  13. v1.21.3Oct 25, 2026
  14. v1.21.0Oct 25, 2026
  15. v1.20.0Oct 24, 2026
  16. v1.17.0Oct 23, 2026
  17. v1.16.4Oct 22, 2026
  18. v1.16.3Oct 21, 2026
  19. v1.11.1Oct 9, 2026
  20. v1.10.0Oct 9, 2026
  21. v1.0.1Sep 16, 2026

评分

已满足适用检查项的 100%

该评分衡量此收录条目的完整程度，依据注册中心条目、端点与公开来源计算得出。它不是对服务器本身的评价，也不表示服务器安全或当前可用：可连通性是带日期的检查结果，评分也不包含安装量或用户评价。

  • 近 30 天内可连通必需25 分
  • 已声明认证方式必需10 分
  • 已列出工具必需15 分
  • 描述必需15 分
  • 图标10 分
  • 文档15 分
  • 许可证10 分

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