# Lob.com **Canonical:** https://apis.io/providers/lobcom/ **Website:** https://docs.lob.com/ **APIs profiled:** 32 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. ## Kin Score — 69.2 / 100 (exemplar) Scored 2026-08-17 under rubric 0.11.0. Trend: rising (+15.6 from 53.6). | Facet | Score | |---|---| | Discoverability | 68.5 | | Contract Quality | 67.5 | | Governance | 11.5 | | Operational Transparency | 84.2 | | Developer Ergonomics | 73.4 | | Commercial Clarity | 92.1 | ## Agent readiness — 57.4 (agent-native) | Dimension | Value | |---|---| | Spec Presence | yes | | Agentic Access | derived | | MCP Server | derived | | Auth Clarity | yes | | Idempotency | documented | | Error Semantics | documented | | OpenAPI Examples | partial | | Rate Limit Signal | verified | | Event Surface Described | yes | | Agent Skills | derived | | Well Known Catalog | yes | | Consent Identity | no | | Agent Card | no | | Dry Run Mode | no | ## Access Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium). ## APIs (32) - **Lob.com Accounts API** — The Accounts API from Lob.com — 1 operation(s) for accounts. - **Lob.com Addresses API** — 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... - **Lob.com Bank Accounts API** — 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... - **Lob.com Billing Groups API** — 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 ... - **Lob.com Booklets API** — The Booklets API from Lob.com — 2 operation(s) for booklets. - **Lob.com Buckslip Orders API** — 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... - **Lob.com Buckslips API** — 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... - **Lob.com Campaigns API** — 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... - **Lob.com Card Orders API** — 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... - **Lob.com Cards API** — 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... - **Lob.com Checks API** — 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... - **Lob.com Creatives API** — 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... - **Lob.com Identity Validation API** — Validates whether a given name is associated with an address.
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- **Lob.com Informed Delivery Campaign API** — The Informed Delivery campaigns API allows you to create and view Informed Delivery campaigns.
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- **Lob.com Intl Verifications API** — Address verification for non-US addresses
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## Intl Verifications Test Env When verifying in... - **Lob.com Letters API** — 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... - **Lob.com Lob Credits API** — The Lob Credits API from Lob.com — 1 operation(s) for lob credits. - **Lob.com Postcards API** — 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.com QR Codes API** — 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 ... - **Lob.com Resource Proofs API** — 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... - **Lob.com Reverse Geocode Lookups API** — Find a list of zip codes associated with a valid US location via latitude and longitude.
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- **Lob.com Self Mailers API** — 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... - **Lob.com Snap Packs API** — The Snap Packs API from Lob.com — 2 operation(s) for snap packs. - **Lob.com Template Versions API** — These API endpoints allow you to create, retrieve, update and delete versions of reusable HTML templates for use with the Print & Mail API.
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## ... - **Lob.com US Verifications API** — Validate, automatically correct, and standardize the addresses in your address book based on USPS's Codi... - **Lob.com Zip Lookups API** — Find a list of cities, states and associated information about a US ZIP code.
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- **Lob.com Events API** — When various notable things happen within the Lob architecture, Events will be created. To get these events sent to your server automatically when they occur, you can set up [We... - **Lob.com Tracking Events API** — As mailpieces travel through the mail stream, USPS scans their unique barcodes, and Lob processes these mail scans to generate tracking events.

Certified Tracking Event Deta... ## MCP servers (1) - **lobcom-mcp.yml** ## Agentic access (1) - **Lobcom Agentic Access** — 105 operations · 61 acting ## Security (3) - **Lobcom Authentication** — http · 1 scheme - **Lobcom Domain Security** — TLSv1.3 · DMARC - **Lobcom Trust Center** — SOC 2 Type 2, HIPAA, GDPR, CCPA/CPRA ## Plans (1) - **Lobcom Plans Pricing** ## Tags Company, Direct Mail, Print, Address Verification, Mail, Postcards, Letters, Checks, Campaigns, USPS, Deliverability --- Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/lobcom/). Scores are computed from the provider's own public artifacts under a published rubric.