How AI is applied across API Evangelist and APIs.io. Read my AI disclosure →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC

Need help?

Contact us
Lob

Lob Zip Lookups API

The Zip Lookups API from Lob — 1 operation(s) for zip lookups.

Documentation Provider Profile APIs.io OpenAPI GitHub

Lob Zip Lookups API is one of 48 APIs that Lob publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Zip Lookups. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

This API exposes 1 operation across 1 path, and defines 12 schemas. It is described by OpenAPI 3.2.0, at version 1.20.2.

Requests are made against a single base URL, https://api.lob.com/v1.

1 operations 1 paths 12 schemas 1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1.20.2
Server
https://api.lob.com/v1
Authentication
HTTP Basic
Contact
Lob Developer Experience
License
MIT
Terms of Service
View terms
Resource Areas
1

Authentication & Security 1

Lob Zip Lookups API declares 1 security scheme for authenticating requests. It accepts HTTP basic authentication (basicAuth). By default, every request must be authenticated.

Paths & Operations 1

Across 1 path, the API surfaces 1 operation — 1 POST. Each is listed below with its method, path, parameters, and response codes.

Zip Lookups 1
POST
/us_zip_lookups
Lookups
zip_lookup body → 200default

Schemas 12

The contract defines 12 schemas that model the data the API accepts and returns. The most detailed are zip_lookup_city (5 properties), zip5 (1 property), error (1 property). Each schema is shown below with its type and property counts.

city_no_description
string
state
string
The ISO 3166-2 two letter code for the state.
county_fips
string
A 5-digit FIPS county code which uniquely identifies components[county]. It consists of a 2-digit state code and a 3-digit county code.
city
failure_status_code
integer
A conventional HTTP status code: 401 - Authorization error with your API key or account 403 - Forbidden error with your API key or account 404 - The requested…
zip
county
string
County name of the address city.
zip_lookup_city
object
5 properties 5 required
zip5
object
1 property 1 required
zip_id
string
Unique identifier prefixed with uszip.
zip_code_type
string
A description of the ZIP code type. For more detailed information about each ZIP code type, see [US Verification Details](tag/US-Verification-Types).
error
object
Lob uses RESTful HTTP response codes to indicate success or failure of an API request. In general, 2xx indicates success, 4xx indicate an input error, and 5xx…
1 property 1 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

lob-zip-lookups-api-openapi.yml Raw ↑

Other APIs Lob publishes across the network.

Lob Accounts API
AE Profile APIs.io
Lob Addresses API
AE Profile APIs.io
Lob Bank Accounts API
AE Profile APIs.io
Lob Bank_id API
AE Profile APIs.io
Lob Bg_id API
AE Profile APIs.io
Lob Billing Groups API
AE Profile APIs.io
Lob Booklet_id API
AE Profile APIs.io
Lob Booklets API
AE Profile APIs.io
Lob Buckslip_id API
AE Profile APIs.io
Lob Buckslips API
AE Profile APIs.io
Lob Bulk API
AE Profile APIs.io
Lob Campaigns API
AE Profile APIs.io
#Zip Lookups
← Back to L APIs
API Details
ID
lob:lob-zip-lookups-api
Server
https://api.lob.com/v1
Docs
https://docs.lob.com/
Provider
Lob
APIs.io →  GitHub →
Explore more
All APIs Providers APIs.io Network
Work with this as data

Every API here is available over the API and to AI agents over MCP. APIs is not yet its own endpoint on the v1 API. Reach this content through network search and the tag graph, or the MCP server below.

Installs https://mcp.apievangelist.com/mcp in Claude, Cursor, VS Code and the rest — one button, every client.

MCP tools for apis
4 tools reach this content
  • search_api_evangelistSearch every content type across the network at once.
  • find_relatedThe shared-tag relevance graph — what else covers this.
  • get_tagEverything one tag labels, across all content types.
  • guide_topicPRO — a curated bundle for a topic: area, guidance, rules, papers, stories, services.
All tools & prompts
Call it yourself
curl for this page
Search the network for this 
curl "https://api.apievangelist.com/v1/search?q=lob-zip-lookups-api&limit=10"
Everything under a tag 
curl "https://api.apievangelist.com/v1/tags/lob-zip-lookups-api"

Discovery needs no key. Full bodies and the synthesis endpoints are Pro.

Get an API key

Free tier, no email required. Sign in with whichever identity you already have.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have. Your account

Where this information came from

This is an independent, third-party profile of Lob Zip Lookups API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.