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Lob Ltr_id API

The Ltr_id API from Lob — 1 operation(s) for ltr_id.

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

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

This API exposes 2 operations across 1 path, and defines 65 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.

2 operations 1 paths 65 schemas 1 DELETE1 GET

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
License
Terms of Service
Resource Areas
1

Authentication & Security 1

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

Paths & Operations 2

Across 1 path, the API surfaces 2 operations — 1 DELETE, 1 GET. Each is listed below with its method, path, parameters, and response codes.

Ltr_id 2
GET
/letters/{ltr_id}
Retrieve
letter_retrieve 1 param → 200default
DELETE
/letters/{ltr_id}
Cancel
letter_cancel 1 param → 200default

Schemas 65

The contract defines 65 schemas that model the data the API accepts and returns. The most detailed are generated (7 properties), failure_reason_error (7 properties), address_fields_us (5 properties), address_fields_intl (5 properties). Each schema is shown below with its type and property counts.

expected_delivery_date
string
A date in YYYY-MM-DD format of the mailpiece's expected delivery date based on its senddate.
ltr_use_type
stringnull
The use type for each mailpiece. Can be one of marketing, operational, or null. Null usetype is only allowed if an account default usetype is selected in Accou…
address_editable_us
buckslip
signed_link
string
A [signed link](section/Asset-URLs) served over HTTPS. The link returned will expire in 30 days to prevent mis-sharing. Each time a GET request is initiated, a…
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…
evnt_id
string
Unique identifier prefixed with evnt.
tracking_event_normal
tracking_event_certified
merge_variables
objectnull
You can input a merge variable payload object to your template or QR code redirect URLs to render dynamic content. For example, if you have a template like: {{…
company
stringnull
Either name or company is required, you may also add both. Must be no longer than 40 characters. If both name and company are provided, they will be printed on…
generated
object
7 properties 2 required
metadata
object
Use metadata to store custom information for tagging and labeling back to your internal systems. Must be an object with up to 20 key-value pairs. Keys must be…
tracking_event_details
object
4 properties 3 required
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
country_extended
string
Must be a 2 letter country short-name code (ISO 3166). Does not accept US, AS, PR, FM, GU, MH, MP, PW, or VI. For these addresses, please use the US verificati…
letter
return_address
Specifies the address the return envelope will be sent back to. This is an optional argument that is available if an account is signed up for the return envelo…
mail_type
string
A string designating the mail postage type: uspsfirstclass - (default) uspsstandard - a cheaper option which is less predictable and takes longer to deliver. u…
return_envelope_returned
object
4 properties
card_id
string
Unique identifier prefixed with card.
certified
card_base
object
2 properties
inline_address_intl
lob_base
object
4 properties 3 required
ltr_id
string
Unique identifier prefixed with ltr.
double_sided
boolean
Set this attribute to true for double sided printing, or false for for single sided printing. Defaults to true.
adr_id
string
Unique identifier prefixed with adr.
address_us
tracking_event_base
object
As mail pieces travel through the mail stream, USPS scans their unique barcodes, and Lob processes these mail scans to generate tracking events.
5 properties 4 required
address_editable_intl
buckslip_base
object
2 properties
buckslip_description
stringnull
Description of the buckslip.
from
object
1 property
inline_address
inline_address_us
failure_reason
object
An object describing the reason for failure if the resource failed to render.
3 properties
buckslip_order
buckslip_id
string
Unique identifier prefixed with bck.
card_description
stringnull
Description of the card.
status
string
A string describing the PDF render status: processed - the rendering process is currently in progress. rendered - a PDF has been successfully rendered of the m…
object
string
Value is resource type.
campaign_id
stringnull
Denotes resources created by the provided campaign id, prefixed with cmp. In the case of snap packs, booklets, and letters with size uslegal, however, the camp…
tmpl_id
string
Unique identifier prefixed with tmpl. ID of a saved [HTML template](section/HTML-Templates).
address
address_intl
date_created
string
A timestamp in ISO 8601 format of the date the resource was created.
send_date
string
A timestamp in ISO 8601 format which specifies a date after the current time and up to 180 days in the future to send the letter off for production. Setting a…
letter_deletion
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…
2 properties
vrsn_id
string
Unique identifier prefixed with vrsn.
address_fields_us
object
5 properties 4 required
color
boolean
Set this key to true if you would like to print in color. Set to false if you would like to print in black and white.
card
address_fields_intl
object
5 properties 2 required
failure_reason_error
object
Failure error details
7 properties
date_modified
string
A timestamp in ISO 8601 format of the date the resource was last modified.
letter_generated_base
address_placement
string
Specifies the location of the address information that will show through the double-window envelope. To see how this will impact your letter design, view our l…
deleted
boolean
Only returned if the resource has been successfully deleted.
custom_envelope_returned
objectnull
A nested custom envelope object containing more information about the custom envelope used or null if a custom envelope was not used.
3 properties 3 required
bo_id
string
Unique identifier prefixed with bo.
no_extra_service
thumbnail
object
3 properties
resource_description
stringnull
An internal description that identifies this resource. Must be no longer than 255 characters.
registered

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

lob-ltr-id-api-openapi.yml Raw ↑

Other APIs Lob publishes across the network.

Lob Accounts API
Lob Addresses API
Lob Bank Accounts API
Lob Bank_id API
Lob Bg_id API
Lob Billing Groups API
Lob Booklet_id API
Lob Booklets API
Lob Buckslip_id API
Lob Buckslips API
Lob Bulk API
Lob Campaigns API
Where this information came from

This is an independent, third-party profile of Lob Ltr_id 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.

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