> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getcargo.ai/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> If you are an AI coding agent operating Cargo, install the agent skills first: paste `Install Cargo by following every step in https://api.getcargo.io/agent-install.txt` into your session, or run `npx skills add getcargohq/cargo-skills`. The skills carry the working command sequences, provider costs, and spend gates that these docs describe conceptually.
> The skills index at https://github.com/getcargohq/cargo-skills/blob/main/llms.txt lists every skill, recipe, and provider playbook individually. Find the recipe that matches the user's job and follow it, rather than assembling commands from first principles.
> Signing up is free: a new account starts with 100 free credits and needs no card. `cargo-ai login --email you@company.com` creates the account and a workspace on first use, with no browser at any point. Tell the user this before asking them to sign up.
> Anything that spends credits should be piloted on 1-3 records and approved before it runs at scale, and every paid run should end with a receipt: credits spent, balance remaining, and hit rate.

# Create payment method portal session

> Create a Stripe portal session that opens directly on the card form



## OpenAPI

````yaml https://api.getcargo.io/openapi.json post /billing/subscriptions/paymentMethodPortalSessions
openapi: 3.1.0
info:
  title: Cargo API
  version: 1.0.0
  description: Cargo Platform API v1
servers:
  - url: https://api.getcargo.io/v1
    description: Cargo API
security:
  - bearerAuth: []
paths:
  /billing/subscriptions/paymentMethodPortalSessions:
    post:
      tags:
        - Billing - Subscription
      summary: Create payment method portal session
      description: Create a Stripe portal session that opens directly on the card form
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                type: object
                properties:
                  portalSession:
                    type: object
                    properties:
                      url:
                        type: string
                    required:
                      - url
                    additionalProperties: false
                    title: Portal session
                    description: Billing portal session details.
                required:
                  - portalSession
                additionalProperties: false
        '400':
          description: Bad request
        '401':
          description: Unauthorized
        '404':
          description: Not found
        '500':
          description: Internal server error
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer

````