Stannp

Stannp Account API

Account balance and user information

GitHub OpenAPI

Operations 3

Each operation below carries the questions people ask an LLM about it and the instructions they give an agent to run it. Generated by API Evangelist overlay

GET /accounts/balance Check the account balance · Get account balance #
Ask an LLM
“How much credit is left on my Stannp account?”
“Do I have enough balance left to pay for my next mailing?”
Tell an agent
Show my current account balance.
Tell me how much money is left in my direct mail account.
POST /accounts/topup Add funds to the account balance · Top up account balance #
Ask an LLM
“Can I prepay credit onto my account so mailings draw from a balance?”
“Will tax be added on top of the amount I top up?”
Tell an agent
Top up my account balance by {net}.
Add {net} of credit to my mailing account before tax.
GET /users/me Look up the signed-in user · Get current user #
Ask an LLM
“Which user is my API key authenticated as?”
“What profile details are on the account I'm logged in with?”
Tell an agent
Show the details of the user I'm authenticated as.
Confirm which user account this API key belongs to.

Documentation

📖
Documentation
https://www.stannp.com/us/direct-mail-api/guide

Specifications

⚙
OpenAPI
https://artifacts.apis.io/stannp/openapi/stannp-account-api-openapi.yml

Schemas & Data

📊
JSONSchema
https://artifacts.apis.io/stannp/json-schema/recipient.json
📊
JSONSchema
https://artifacts.apis.io/stannp/json-schema/mailpiece.json
📊
JSONSchema
https://artifacts.apis.io/stannp/json-schema/campaign.json

Other Resources

🔗
Overlay
https://artifacts.apis.io/stannp/overlays/stannp-account-api-overlay.yaml
🔗
Vocabulary
https://artifacts.apis.io/stannp/vocabulary/stannp-vocabulary.yml
🔗
JSONLDContext
https://artifacts.apis.io/stannp/json-ld/stannp-context.jsonld
🔗
APIsJSON
https://artifacts.apis.io/stannp/apis.yml

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/stannp:stannp-account-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

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

OpenAPI Specification

stannp-account-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Stannp Direct Mail Account API
  description: REST API for programmatically sending physical letters and postcards, managing recipient groups, configuring campaigns, triggering individual mail pieces, and tracking delivery status through webhooks and event callbacks. Authentication uses API key-based HTTP Basic Auth over HTTPS.
  version: 1.0.0
  contact:
    name: Stannp Support
    url: https://www.stannp.com/us/direct-mail-api/guide
  termsOfService: https://www.stannp.com
servers:
- url: https://api-us1.stannp.com/v1
  description: US API server
- url: https://api-eu1.stannp.com/v1
  description: EU API server
security:
- basicAuth: []
tags:
- name: Account
  description: Account balance and user information
paths:
  /accounts/balance:
    get:
      operationId: getAccountBalance
      summary: Get account balance
      description: Retrieve the current account balance.
      tags:
      - Account
      responses:
        '200':
          description: Account balance retrieved successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BalanceResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /accounts/topup:
    post:
      operationId: topUpBalance
      summary: Top up account balance
      description: Add funds to the account balance.
      tags:
      - Account
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              type: object
              required:
              - net
              properties:
                net:
                  type: string
                  description: The amount to top up (e.g. "10.00"). Tax may be added after.
                  example: '10.00'
      responses:
        '200':
          description: Balance topped up successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  data:
                    type: object
                    properties:
                      receipt_pdf:
                        type: string
                        format: uri
                        description: URL to the receipt PDF
        '401':
          $ref: '#/components/responses/Unauthorized'
  /users/me:
    get:
      operationId: getCurrentUser
      summary: Get current user
      description: Retrieve information about the currently authenticated user.
      tags:
      - Account
      responses:
        '200':
          description: User information retrieved successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/UserResponse'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  schemas:
    ErrorResponse:
      type: object
      properties:
        success:
          type: boolean
          example: false
        error:
          type: string
          description: Error message
    BalanceResponse:
      type: object
      properties:
        success:
          type: boolean
        data:
          type: object
          properties:
            balance:
              type: string
              description: Current account balance as a decimal string
              example: '150.00'
    UserResponse:
      type: object
      properties:
        success:
          type: boolean
        data:
          type: object
          description: Current user account details
  responses:
    Unauthorized:
      description: Authentication required or API key invalid
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: Use your API key as the username and leave the password blank.