Lob is the direct-mail and address-verification API for developers. Its REST API lets teams programmatically create and mail postcards, letters, checks, self-mailers, snap packs, booklets, buckslips and cards; verify and autocomplete US and international addresses; run direct-mail and USPS Informed Delivery campaigns; manage HTML templates; and track physical delivery through USPS scan events surfaced over webhooks. The API is organized around REST with resource-oriented URLs, HTTP Basic authentication using test_/live_ API keys, cursor pagination, Idempotency-Key support, and standard rate-limit headers. Lob was surfaced as an a16z portfolio company and enriched into the API Evangelist network from its public OpenAPI, docs, SDKs, and registries.
Lob.com publishes 30 APIs on the APIs.io network, including Accounts API, Addresses API, Bank Accounts API, and 27 more. Tagged areas include Company, Direct Mail, Print, Address Verification, and Mail.
The Lob.com catalog on APIs.io includes 1 event-driven AsyncAPI specification.
Lob.com’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 26 more developer resources.
To add an address to your address book, you create a new address object. You can retrieve and delete individual addresses as well as get a list of addresses. Addresses are ident...
Bank Accounts allow you to store your bank account securely in our system. The API provides endpoints for creating bank accounts, deleting bank accounts, verifying bank accounts...
The Billing Groups API allows you to create and view labels that can be attached to certain consumption-based usages of Letters, Checks, Postcards and Self-Mailers to customize ...
The Buckslip Orders endpoint allows you to easily create buckslip orders for existing buckslips. The API provides endpoints for creating buckslip orders and listing buckslip ord...
The Buckslips endpoint allows you to easily create buckslips that can later be used as add-ons for Letters Campaigns. Note that a Letter Campaign with Buckslip add-on requires a...
The campaigns endpoint allows you to create and view campaigns that can be used to send multiple letters or postcards. The API provides endpoints for creating campaigns, updatin...
The card orders endpoint allows you to easily create card orders for existing cards. The API provides endpoints for creating card orders and listing card orders for a given card...
The cards endpoint allows you to easily create cards that can later be affixed to Letters. The API provides endpoints for creating cards, retrieving individual cards, creating c...
Checks allow you to send payments via physical checks. The API provides endpoints for creating checks, retrieving individual checks, canceling checks, and retrieving a list of c...
The creatives endpoint allows you to create and view creatives. Creatives are used to create reusable letter and postcard templates. The API provides endpoints for creating crea...
The letters endpoint allows you to easily print and mail letters. The API provides endpoints for creating letters, retrieving individual letters, canceling letters, and retrievi...
The postcards endpoint allows you to easily print and mail postcards. The API provides endpoints for creating postcards, retrieving individual postcards, canceling postcards, an...
Lob QR codes allow you to generate a QR code that is unique to each mailpiece, thereby allowing each and every customers to receive a personalized link. See the Create endpoint ...
The resource proofs endpoint allows you to create a final rendering of any template. This is best practice to ensure that you are visually validating your creative before any ma...
The self mailer endpoint allows you to easily print and mail self mailers. The API provides endpoints for creating self mailers, retrieving individual self mailers, canceling se...
The uploads endpoint allows you to upload audience files that are then associated with a given campaign. At this time, only CSV files are allowed. The API provides endpoints for...
Lob's URL shortener allows you to generate unique short links, either with Lob's own domain or your own custom domains. Each custom link enables Lob to track mail individually a...
aid: lobcom
name: Lob.com
description: Lob is the direct-mail and address-verification API for developers. Its REST API lets teams programmatically
create and mail postcards, letters, checks, self-mailers, snap packs, booklets, buckslips and cards; verify and autocomplete
US and international addresses; run direct-mail and USPS Informed Delivery campaigns; manage HTML templates; and track physical
delivery through USPS scan events surfaced over webhooks. The API is organized around REST with resource-oriented URLs,
HTTP Basic authentication using test_/live_ API keys, cursor pagination, Idempotency-Key support, and standard rate-limit
headers. Lob was surfaced as an a16z portfolio company and enriched into the API Evangelist network from its public OpenAPI,
docs, SDKs, and registries.
url: https://raw.githubusercontent.com/api-evangelist/lobcom/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
pricing: unknown
onboarding: self-serve
trial: false
try_now: false
public: false
label: Self-serve signup
confidence: medium
source:
- authentication
generated: '2026-07-22'
method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
image: https://www.lob.com/favicon.ico
tags:
- Company
- Direct Mail
- Print
- Address Verification
- Mail
- Postcards
- Letters
- Checks
- Campaigns
- USPS
- Deliverability
apis:
- aid: lobcom:lobcom-accounts-api
name: Lob.com Accounts API
description: The Accounts API from Lob.com — 1 operation(s) for accounts.
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Accounts
properties:
- type: OpenAPI
url: openapi/lobcom-accounts-api-openapi.yml
- aid: lobcom:lobcom-addresses-api
name: Lob.com Addresses API
description: 'To add an address to your address book, you create a new address object. You can retrieve and delete individual
addresses as well as get a list of addresses. Addresses are identified by a unique random ID.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Addresses
properties:
- type: OpenAPI
url: openapi/lobcom-addresses-api-openapi.yml
- aid: lobcom:lobcom-bank-accounts-api
name: Lob.com Bank Accounts API
description: 'Bank Accounts allow you to store your bank account securely in our system. The API provides
endpoints for creating bank accounts, deleting bank accounts, verifying bank accounts,
retrieving individual bank accounts, and retrieving a list of bank accounts.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Bank Accounts
properties:
- type: OpenAPI
url: openapi/lobcom-bank-accounts-api-openapi.yml
- aid: lobcom:lobcom-billing-groups-api
name: Lob.com Billing Groups API
description: 'The Billing Groups API allows you to create and view labels that can be attached to certain consumption-based
usages of Letters, Checks, Postcards and Self-Mailers to customize your bill. Please check each
resource API section to learn more about how to access the Billing Groups API.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Billing Groups
properties:
- type: OpenAPI
url: openapi/lobcom-billing-groups-api-openapi.yml
- aid: lobcom:lobcom-booklets-api
name: Lob.com Booklets API
description: The Booklets API from Lob.com — 2 operation(s) for booklets.
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Booklets
properties:
- type: OpenAPI
url: openapi/lobcom-booklets-api-openapi.yml
- aid: lobcom:lobcom-buckslip-orders-api
name: Lob.com Buckslip Orders API
description: 'The Buckslip Orders endpoint allows you to easily create buckslip orders for existing buckslips.
The API provides endpoints for creating buckslip orders and listing buckslip orders for a given buckslip.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Buckslip Orders
properties:
- type: OpenAPI
url: openapi/lobcom-buckslip-orders-api-openapi.yml
- aid: lobcom:lobcom-buckslips-api
name: Lob.com Buckslips API
description: 'The Buckslips endpoint allows you to easily create buckslips that can later be used as add-ons for Letters
Campaigns. Note that a Letter Campaign with Buckslip add-on requires a minimum send quantity of 5,000 letters.
The API provides endpoints for creating buckslips, retrieving individual buckslips, creating buckslip orders, and retrieving
a list of buckslips.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Buckslips
properties:
- type: OpenAPI
url: openapi/lobcom-buckslips-api-openapi.yml
- aid: lobcom:lobcom-campaigns-api
name: Lob.com Campaigns API
description: 'The campaigns endpoint allows you to create and view campaigns that can be used to send multiple letters or
postcards.
The API provides endpoints for creating campaigns, updating campaigns, retrieving individual campaigns, listing campaigns,
and deleting
campaigns.'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Campaigns
properties:
- type: OpenAPI
url: openapi/lobcom-campaigns-api-openapi.yml
- aid: lobcom:lobcom-card-orders-api
name: Lob.com Card Orders API
description: 'The card orders endpoint allows you to easily create card orders for existing cards.
The API provides endpoints for creating card orders and listing card orders for a given card.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Card Orders
properties:
- type: OpenAPI
url: openapi/lobcom-card-orders-api-openapi.yml
- aid: lobcom:lobcom-cards-api
name: Lob.com Cards API
description: 'The cards endpoint allows you to easily create cards that can later be affixed to Letters.
The API provides endpoints for creating cards, retrieving individual cards, creating card orders, and retrieving a list
of cards.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Cards
properties:
- type: OpenAPI
url: openapi/lobcom-cards-api-openapi.yml
- aid: lobcom:lobcom-checks-api
name: Lob.com Checks API
description: 'Checks allow you to send payments via physical checks. The API provides endpoints
for creating checks, retrieving individual checks, canceling checks, and retrieving a list of checks.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Checks
properties:
- type: OpenAPI
url: openapi/lobcom-checks-api-openapi.yml
- aid: lobcom:lobcom-creatives-api
name: Lob.com Creatives API
description: 'The creatives endpoint allows you to create and view creatives. Creatives are used to create
reusable letter and postcard templates. The API provides endpoints for creating creatives, updating creatives,
retrieving individual creatives, and deleting creatives.'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Creatives
properties:
- type: OpenAPI
url: openapi/lobcom-creatives-api-openapi.yml
- aid: lobcom:lobcom-identity-validation-api
name: Lob.com Identity Validation API
description: 'Validates whether a given name is associated with an address.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Identity Validation
properties:
- type: OpenAPI
url: openapi/lobcom-identity-validation-api-openapi.yml
- aid: lobcom:lobcom-informed-delivery-campaign-api
name: Lob.com Informed Delivery Campaign API
description: 'The Informed Delivery campaigns API allows you to create and view Informed Delivery campaigns.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Informed Delivery Campaign
properties:
- type: OpenAPI
url: openapi/lobcom-informed-delivery-campaign-api-openapi.yml
- aid: lobcom:lobcom-intl-verifications-api
name: Lob.com Intl Verifications API
description: "Address verification for non-US addresses\n<br>\n<div class=\"back-to-top\" ><a href=\"#\" onclick=\"toTopLink()\"\
>back to top</a></div>\n\n## Intl Verifications Test Env\n\nWhen verifying international addresses, you'll likely want\
\ to test against\na wide array of addresses to ensure you're handling responses correctly.\nWith your test API key, requests\
\ that use specific values for `primary_line`\nlet you explore the responses to many types of addresses:\n\n<table>\n\
\ <tr>\n <th style=\"white-space: nowrap\">DELIVERABILITY OF SAMPLE RESPONSE</th>\n <th style=\"white-space: nowrap\"\
>SET <code>primary_line</code> TO</th>\n </tr>\n <tr>\n <td style=\"white-space: nowrap\"><code>deliverable</code></td>\n\
\ <td style=\"white-space: nowrap\">deliverable</td>\n </tr>\n <tr>\n <td style=\"white-space: nowrap\"><code>deliverable_missing_info</code></td>\n\
\ <td style=\"white-space: nowrap\">deliverable missing info</td>\n </tr>\n <tr>\n <td style=\"white-space: nowrap\"\
><code>undeliverable</code></td>\n <td style=\"white-space: nowrap\">undeliverable</td>\n </tr>\n <tr>\n <td style=\"\
white-space: nowrap\"><code>no_match</code></td>\n <td style=\"white-space: nowrap\">no match</td>\n </tr>\n</table>\n\
\nSee the `test` request & response examples under [Intl Verification Examples](#operation/intl_verification) within the\n\
\"Verify an international address section\" in Intl Verifications.\n\nYou can rely on the response from these examples\
\ generally matching the response\nyou'd see in the live environment with an address of that type (excluding the `recipient`\
\ field).\n\nThe test API key does not perform any verification, automatic correction, or standardization\nfor addresses.\
\ If you wish to try these features out, use our <a href=\"https://lob.com/address-verification\" target=\"_blank\">live\
\ demo</a>\nor the free plan (see <a href=\"https://lob.com/pricing/address-verification\" target=\"_blank\">our pricing</a>\
\ for details).\n<div class=\"back-to-top\" ><a href=\"#\" onclick=\"toTopLink()\">back to top</a></div>"
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Intl Verifications
properties:
- type: OpenAPI
url: openapi/lobcom-intl-verifications-api-openapi.yml
- aid: lobcom:lobcom-letters-api
name: Lob.com Letters API
description: 'The letters endpoint allows you to easily print and mail letters. The API provides endpoints for
creating letters, retrieving individual letters, canceling letters, and retrieving a list of letters.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Letters
properties:
- type: OpenAPI
url: openapi/lobcom-letters-api-openapi.yml
- aid: lobcom:lobcom-lob-credits-api
name: Lob.com Lob Credits API
description: The Lob Credits API from Lob.com — 1 operation(s) for lob credits.
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Lob Credits
properties:
- type: OpenAPI
url: openapi/lobcom-lob-credits-api-openapi.yml
- aid: lobcom:lobcom-postcards-api
name: Lob.com Postcards API
description: 'The postcards endpoint allows you to easily print and mail postcards. The API provides endpoints for creating
postcards,
retrieving individual postcards, canceling postcards, and retrieving a list of postcards.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Postcards
properties:
- type: OpenAPI
url: openapi/lobcom-postcards-api-openapi.yml
- aid: lobcom:lobcom-qr-codes-api
name: Lob.com QR Codes API
description: 'Lob QR codes allow you to generate a QR code that is unique to each mailpiece, thereby allowing each and every
customers to receive a personalized link. See the Create endpoint for <a href="#tag/Letters/operation/letter_create">Letters</a>,
<a href="#tag/Postcards/operation/postcard_create">Postcards</a> or <a href="#tag/Self-Mailers/operation/self_mailer_create">Self
Mailers</a> to learn how to embed a QR code into your mail piece.
Webhooks can be used to integrate Lob QR code scans into your omni channel marketing strategy. See the <a href="#tag/Webhooks">Webhooks</a>
section of our documentation to learn how to enable the `letter.viewed`, `postcard.viewed` and `self_mailer.viewed` event
notifications for your mail pieces.
Furthermore, our QR code Analytics endpoint can be used to track the impact and engagement rate of your mail sends. Lob
can tell you exactly which recipients opened your mailpiece. Our Analytics endpoint allows you to see exactly which recipient
scanned a mailpiece, when they scanned it, and more!
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- QR Codes
properties:
- type: OpenAPI
url: openapi/lobcom-qr-codes-api-openapi.yml
- aid: lobcom:lobcom-resource-proofs-api
name: Lob.com Resource Proofs API
description: 'The resource proofs endpoint allows you to create a final rendering of any template. This is best practice
to ensure that you are visually validating your creative before any mail pieces use the template. The API provides endpoints
for creating, updating, and retrieving template proofs.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Resource Proofs
properties:
- type: OpenAPI
url: openapi/lobcom-resource-proofs-api-openapi.yml
- aid: lobcom:lobcom-reverse-geocode-lookups-api
name: Lob.com Reverse Geocode Lookups API
description: Find a list of zip codes associated with a valid US location via latitude and longitude. <br> <div class="back-to-top"
><a href="#" onclick="toTopLink()">back to top</a></div>
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Reverse Geocode Lookups
properties:
- type: OpenAPI
url: openapi/lobcom-reverse-geocode-lookups-api-openapi.yml
- aid: lobcom:lobcom-self-mailers-api
name: Lob.com Self Mailers API
description: 'The self mailer endpoint allows you to easily print and mail self mailers. The API provides endpoints
for creating self mailers, retrieving individual self mailers, canceling self mailers, and retrieving a list of self mailers.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Self Mailers
properties:
- type: OpenAPI
url: openapi/lobcom-self-mailers-api-openapi.yml
- aid: lobcom:lobcom-snap-packs-api
name: Lob.com Snap Packs API
description: The Snap Packs API from Lob.com — 2 operation(s) for snap packs.
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Snap Packs
properties:
- type: OpenAPI
url: openapi/lobcom-snap-packs-api-openapi.yml
- aid: lobcom:lobcom-template-versions-api
name: Lob.com Template Versions API
description: 'These API endpoints allow you to create, retrieve, update and delete versions of reusable HTML templates for
use with the Print & Mail API.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Template Versions
properties:
- type: OpenAPI
url: openapi/lobcom-template-versions-api-openapi.yml
- aid: lobcom:lobcom-templates-api
name: Lob.com Templates API
description: 'These API endpoints allow you to create, retrieve, update and delete reusable HTML templates for use with
the Print & Mail API.
<div class="back-to-top" ><a href="#" onclick="toTopLink()">back to top</a></div>'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Templates
properties:
- type: OpenAPI
url: openapi/lobcom-templates-api-openapi.yml
- aid: lobcom:lobcom-uploads-api
name: Lob.com Uploads API
description: 'The uploads endpoint allows you to upload audience files that are then associated with a given campaign.
At this time, only CSV files are allowed. The API provides endpoints for creating uploads, uploading audience files,
and marking uploaded files as ready for processing. The API also provides endpoints for downloading files that
describe the results, both successful and not, of the processing.'
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Uploads
properties:
- type: OpenAPI
url: openapi/lobcom-uploads-api-openapi.yml
- aid: lobcom:lobcom-url-shortener-api
name: Lob.com URL Shortener API
description: "Lob's URL shortener allows you to generate unique short links, either with Lob's own domain or your own custom\
\ domains. Each custom link enables Lob to track mail individually and provide customers the relevant tracking data in\
\ their dashboard.\n\nWebhooks can be used to integrate Lob's URL Shortener scans into your omni channel marketing stratergy.\
\ See the <a href=\"#tag/Webhooks\">Webhooks</a> section of our documentation to learn how to enable the `letter.viewed`,\
\ `postcard.viewed` and `self_mailer.viewed` event notifications for your mail pieces.\n\nFurthermore, you can use our\
\ Retrieve endpoints to track the impact and engagement rate of links created. \n\n<div class=\"back-to-top\" ><a href=\"\
#\" onclick=\"toTopLink()\">back to top</a></div>"
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- URL Shortener
properties:
- type: OpenAPI
url: openapi/lobcom-url-shortener-api-openapi.yml
- aid: lobcom:lobcom-us-autocompletions-api
name: Lob.com US Autocompletions API
description: "Given partial address information, this endpoint returns up to 10 address suggestions. <br> <div class=\"\
back-to-top\" ><a href=\"#\" onclick=\"toTopLink()\">back to top</a></div>\n## Autocompletion Test Env\nYour test API\
\ key does not autocomplete US addresses and is used to simulate behavior. With your test API key, requests with specific\
\ values for `address_prefix` return predetermined values. When `address_prefix` is set to:\n- `0 suggestions` - Returns\
\ no suggestions - `[PRIMARY NUMBER] s[uggestion]` - Returns a maximum of ten predefined suggested addresses.\n `[PRIMARY\
\ NUMBER]` does not have to be a valid primary number when sending a test request.\n Each additional letter in `suggestion`\
\ reduces the number of suggestions by one (e.g.\n `1 su` returns 9 suggested addresses). `[PRIMARY NUMBER]` does not\
\ affect the number of\n suggestions returned.\n\nCity and state filters work as expected and filter the list of predetermined\
\ suggested addresses.\nSee the `test` request & response examples under [Autocomplete Examples](#operation/autocompletion)\
\ within the \"Autocomplete a partial address\" section in US Autocompletions. <div class=\"back-to-top\" ><a href=\"\
#\" onclick=\"toTopLink()\">back to top</a></div>"
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- US Autocompletions
properties:
- type: OpenAPI
url: openapi/lobcom-us-autocompletions-api-openapi.yml
- aid: lobcom:lobcom-us-verifications-api
name: Lob.com US Verifications API
description: "Validate, automatically correct, and standardize the addresses in your\naddress book based on USPS's <a href=\"\
https://postalpro.usps.com/certifications/cass\" target=\"_blank\">Coding Accuracy Support System (CASS)</a>.\n<br>\n\
<div class=\"back-to-top\" ><a href=\"#\" onclick=\"toTopLink()\">back to top</a></div>\n\n## US Verifications Test Env\n\
\nWhen verifying US addresses, you'll likely want to test against a wide array of addresses to\nensure you're handling\
\ responses correctly. With your test API key, requests that use specific\nvalues for `address` or `primary_line` and\
\ (if using `primary_line`) an arbitrary five digit\nnumber for `zip_code` (e.g. \"11111\") let you explore the responses\
\ to many types of addresses:\n\n<table>\n <tr>\n <th style=\"white-space: nowrap\">ADDRESS TYPE FOR SAMPLE RESPONSE</th>\n\
\ <th style=\"white-space: nowrap\">DELIVERABILITY</th>\n <th style=\"white-space: nowrap\">SET <code>primary_line</code>\
\ OR <code>address</code> TO</th>\n </tr>\n <tr>\n <td style=\"white-space: nowrap\">Commercial highrise</td>\n \
\ <td style=\"white-space: nowrap\"><code>deliverable</code></td>\n <td style=\"white-space: nowrap\"><code>commercial\
\ highrise</code></td>\n </tr>\n <tr>\n <td style=\"white-space: nowrap\">Residential highrise</td>\n <td style=\"\
white-space: nowrap\"><code>deliverable</code></td>\n <td style=\"white-space: nowrap\"><code>residential highrise</code></td>\n\
\ </tr>\n <tr>\n <td style=\"white-space: nowrap\">Residential house</td>\n <td style=\"white-space: nowrap\"\
><code>deliverable</code></td>\n <td style=\"white-space: nowrap\"><code>residential house</code></td>\n </tr>\n \
\ <tr>\n <td style=\"white-space: nowrap\">PO Box</td>\n <td style=\"white-space: nowrap\"><code>deliverable</code></td>\n\
\ <td style=\"white-space: nowrap\"><code>po box</code></td>\n </tr>\n <tr>\n <td style=\"white-space: nowrap\"\
>Rural route</td>\n <td style=\"white-space: nowrap\"><code>deliverable</code></td>\n <td style=\"white-space: nowrap\"\
><code>rural route</code></td>\n </tr>\n <tr>\n <td style=\"white-space: nowrap\">Puerty Rico address w/ urbanization</td>\n\
\ <td style=\"white-space: nowrap\"><code>deliverable</code></td>\n <td style=\"white-space: nowrap\"><code>puerto\
\ rico</code></td>\n </tr>\n <tr>\n <td style=\"white-space: nowrap\">Military address</td>\n <td style=\"white-space:\
\ nowrap\"><code>deliverable</code></td>\n <td style=\"white-space: nowrap\"><code>military</code></td>\n </tr>\n\
\ <tr>\n <td style=\"white-space: nowrap\">Department of state</td>\n <td style=\"white-space: nowrap\"><code>deliverable</code></td>\n\
\ <td style=\"white-space: nowrap\"><code>department of state</code></td>\n </tr>\n <tr>\n <td style=\"white-space:\
\ nowrap\">Generic deliverable</td>\n <td style=\"white-space: nowrap\"><code>deliverable</code></td>\n <td style=\"\
white-space: nowrap\"><code>deliverable</code></td>\n </tr>\n <tr>\n <td style=\"white-space: nowrap\">Missing a\
\ suite number</td>\n <td style=\"white-space: nowrap\"><code>deliverable_missing_unit</code></td>\n <td style=\"\
white-space: nowrap\"><code>missing unit</code></td>\n </tr>\n <tr>\n <td style=\"white-space: nowrap\">Suite number\
\ doesn't exist</td>\n <td style=\"white-space: nowrap\"><code>deliverable_incorrect_unit</code></td>\n <td style=\"\
white-space: nowrap\"><code>incorrect unit</code></td>\n </tr>\n <tr>\n <td style=\"white-space: nowrap\">Residential\
\ house with unnecessary suite number</td>\n <td style=\"white-space: nowrap\"><code>deliverable_unnecessary_unit</code></td>\n\
\ <td style=\"white-space: nowrap\"><code>unnecessary unit</code></td>\n </tr>\n <tr>\n <td style=\"white-space:\
\ nowrap\">Undeliverable and block matched</td>\n <td style=\"white-space: nowrap\"><code>undeliverable</code></td>\n\
\ <td style=\"white-space: nowrap\"><code>undeliverable block match</code></td>\n </tr>\n <tr>\n <td style=\"\
white-space: nowrap\">Undeliverable and no block matched</td>\n <td style=\"white-space: nowrap\"><code>undeliverable</code></td>\n\
\ <td style=\"white-space: nowrap\"><code>undeliverable no match</code></td>\n </tr>\n</table>\n\nSee the `test` request\
\ & response examples under [US Verification Examples](#operation/us_verification) within the\n\"Verify a US or US territory\
\ address\" section in US Verifications.\n\nYou can rely on the response from these examples generally matching the response\
\ you'd see in the live environment with an\naddress of that type (excluding the `recipient` field).\n\nThe test API key\
\ does not perform any verification, automatic correction, or standardization for addresses. If you wish to\ntry these\
\ features out, use our <a href=\"https://lob.com/address-verification\" target=\"_blank\">live demo</a> or the free plan\
\ (see <a href=\"https://lob.com/pricing/address-verification\" target=\"_blank\">our pricing</a> for details).\n<div\
\ class=\"back-to-top\" ><a href=\"#\" onclick=\"toTopLink()\">back to top</a></div>"
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- US Verifications
properties:
- type: OpenAPI
url: openapi/lobcom-us-verifications-api-openapi.yml
- aid: lobcom:lobcom-zip-lookups-api
name: Lob.com Zip Lookups API
description: Find a list of cities, states and associated information about a US ZIP code. <div class="back-to-top" ><a
href="#" onclick="toTopLink()">back to top</a></div>
humanURL: https://docs.lob.com/
baseURL: https://api.lob.com/v1
tags:
- Zip Lookups
properties:
- type: OpenAPI
url: openapi/lobcom-zip-lookups-api-openapi.yml
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
- FN: APIs.json
email: info@apis.io
common:
- type: DeveloperPortal
url: https://docs.lob.com/
- type: Documentation
url: https://docs.lob.com/
- type: APIReference
url: https://docs.lob.com/
- type: GettingStarted
url: https://docs.lob.com/#tag/Getting-Started
- type: Support
url: https://help.lob.com/
- type: Blog
url: https://www.lob.com/blog
- type: GitHubOrganization
url: https://github.com/lob
- type: Pricing
url: https://www.lob.com/pricing
- type: SignUp
url: https://dashboard.lob.com/register
- type: Login
url: https://dashboard.lob.com/login
- type: TermsOfService
url: https://www.lob.com/legal/terms
- type: PrivacyPolicy
url: https://www.lob.com/legal/privacy
- type: StatusPage
url: https://status.lob.com/
- type: Packages
url: packages/lobcom-packages.yml
- type: SDKs
url: packages/lobcom-packages.yml
- type: WellKnown
url: well-known/lobcom-well-known.yml
- type: MCPServer
url: mcp/lobcom-mcp.yml
- type: LLMsTxt
url: llms/lobcom-llms.txt
- type: Conformance
url: conformance/lobcom-conformance.yml
- type: ErrorCatalog
url: errors/lobcom-problem-types.yml
- type: ErrorCatalog
name: Error code registry
url: errors/lobcom-error-codes.yml
- type: Lifecycle
url: lifecycle/lobcom-lifecycle.yml
- type: Deprecation
url: https://docs.lob.com/#tag/Versioning-and-Changelog
- type: ChangeLog
url: changelog/lobcom-changelog.yml
- type: Conventions
url: conventions/lobcom-conventions.yml
- type: Idempotency
url: conventions/lobcom-conventions.yml
- type: Sandbox
url: sandbox/lobcom-sandbox.yml
- type: DataModel
url: data-model/lobcom-data-model.yml
- type: Webhooks
url: asyncapi/lobcom-webhooks.yml
- type: AgentSkill
url: skills/_index.yml
- type: Authentication
url: authentication/lobcom-authentication.yml
- type: DomainSecurity
url: security/lobcom-domain-security.yml
- type: AgenticAccess
url: agentic-access/lobcom-agentic-access.yml
x-enrichment:
date: '2026-07-20'
status: enriched
artifacts_added: 19
pass: local-v1
Kin Score
How this is scored →