> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.trygrant.com/api-reference/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.trygrant.com/_mcp/server.

# API Reference

> API documentation for Grant — billing infrastructure for usage-based pricing

## Docs

- [Authentication](https://docs.trygrant.com/api-reference/authentication.md): Secure your API requests with bearer token authentication

## API Docs

- [List customers](https://docs.trygrant.com/api-reference/grant-events-api/customers/list.md): Grant Events API > Customers
- [Create a customer](https://docs.trygrant.com/api-reference/grant-events-api/customers/create.md): Grant Events API > Customers
- [Search customers](https://docs.trygrant.com/api-reference/grant-events-api/customers/search.md): Grant Events API > Customers
- [Retrieve a customer](https://docs.trygrant.com/api-reference/grant-events-api/customers/get.md): Grant Events API > Customers
- [Update a customer](https://docs.trygrant.com/api-reference/grant-events-api/customers/update.md): Grant Events API > Customers
- [Delete a customer](https://docs.trygrant.com/api-reference/grant-events-api/customers/delete.md): Grant Events API > Customers
- [Create a customer portal link](https://docs.trygrant.com/api-reference/grant-events-api/customers/create-portal-link.md): Grant Events API > Customers
- [List customer balances](https://docs.trygrant.com/api-reference/grant-events-api/customers/list-balances.md): Grant Events API > Customers
- [Synchronously ingest billable events](https://docs.trygrant.com/api-reference/grant-events-api/events/ingest.md): Grant Events API > Events
- [List subscriptions](https://docs.trygrant.com/api-reference/grant-events-api/subscriptions/list.md): Grant Events API > Subscriptions
- [Create a subscription](https://docs.trygrant.com/api-reference/grant-events-api/subscriptions/create.md): Grant Events API > Subscriptions
- [Retrieve a subscription](https://docs.trygrant.com/api-reference/grant-events-api/subscriptions/get.md): Grant Events API > Subscriptions
- [Update a subscription](https://docs.trygrant.com/api-reference/grant-events-api/subscriptions/update.md): Grant Events API > Subscriptions
- [Cancel a subscription](https://docs.trygrant.com/api-reference/grant-events-api/subscriptions/cancel.md): Grant Events API > Subscriptions
- [Change subscription plan](https://docs.trygrant.com/api-reference/grant-events-api/subscriptions/change-plan.md): Grant Events API > Subscriptions
- [Create a credit grant on a subscription](https://docs.trygrant.com/api-reference/grant-events-api/subscriptions/create-credit-grant.md): Grant Events API > Subscriptions
- [List invoices](https://docs.trygrant.com/api-reference/grant-events-api/invoices/list.md): Grant Events API > Invoices
- [Retrieve an invoice](https://docs.trygrant.com/api-reference/grant-events-api/invoices/get.md): Grant Events API > Invoices
- [List plans](https://docs.trygrant.com/api-reference/grant-events-api/plans/list.md): Grant Events API > Plans
- [Create a plan](https://docs.trygrant.com/api-reference/grant-events-api/plans/create.md): Grant Events API > Plans
- [Retrieve a plan](https://docs.trygrant.com/api-reference/grant-events-api/plans/get.md): Grant Events API > Plans
- [Update a plan](https://docs.trygrant.com/api-reference/grant-events-api/plans/update.md): Grant Events API > Plans
- [Delete a plan](https://docs.trygrant.com/api-reference/grant-events-api/plans/delete.md): Grant Events API > Plans
- [List plan fees](https://docs.trygrant.com/api-reference/grant-events-api/plan-fees/list-fees.md): Grant Events API > Plan fees
- [Add a fee to a plan](https://docs.trygrant.com/api-reference/grant-events-api/plan-fees/create-fee.md): Grant Events API > Plan fees
- [Retrieve a plan fee](https://docs.trygrant.com/api-reference/grant-events-api/plan-fees/get-fee.md): Grant Events API > Plan fees
- [Update a plan fee](https://docs.trygrant.com/api-reference/grant-events-api/plan-fees/update-fee.md): Grant Events API > Plan fees
- [Remove a fee from a plan](https://docs.trygrant.com/api-reference/grant-events-api/plan-fees/delete-fee.md): Grant Events API > Plan fees
- [List catalogs attached to a plan](https://docs.trygrant.com/api-reference/grant-events-api/plan-catalogs/list-catalogs.md): Grant Events API > Plan catalogs
- [Attach a catalog to a plan](https://docs.trygrant.com/api-reference/grant-events-api/plan-catalogs/attach-catalog.md): Grant Events API > Plan catalogs
- [Update catalog pricing on a plan](https://docs.trygrant.com/api-reference/grant-events-api/plan-catalogs/update-catalog.md): Grant Events API > Plan catalogs
- [Detach a catalog from a plan](https://docs.trygrant.com/api-reference/grant-events-api/plan-catalogs/detach-catalog.md): Grant Events API > Plan catalogs
- [List credit grant policies](https://docs.trygrant.com/api-reference/grant-events-api/plan-credit-grant-policies/list-credit-grant-policies.md): Grant Events API > Plan credit grant policies
- [Create a credit grant policy](https://docs.trygrant.com/api-reference/grant-events-api/plan-credit-grant-policies/create-credit-grant-policy.md): Grant Events API > Plan credit grant policies
- [Update a credit grant policy](https://docs.trygrant.com/api-reference/grant-events-api/plan-credit-grant-policies/update-credit-grant-policy.md): Grant Events API > Plan credit grant policies
- [Delete a credit grant policy](https://docs.trygrant.com/api-reference/grant-events-api/plan-credit-grant-policies/delete-credit-grant-policy.md): Grant Events API > Plan credit grant policies
- [List credit packs](https://docs.trygrant.com/api-reference/grant-events-api/credit-packs/list.md): Grant Events API > Credit packs
- [Retrieve a credit pack](https://docs.trygrant.com/api-reference/grant-events-api/credit-packs/get.md): Grant Events API > Credit packs
- [Create a credit pack checkout link](https://docs.trygrant.com/api-reference/grant-events-api/credit-packs/create-checkout-link.md): Grant Events API > Credit packs
- [List pricing units](https://docs.trygrant.com/api-reference/grant-events-api/pricing-units/list.md): Grant Events API > Pricing units
- [Create a pricing unit](https://docs.trygrant.com/api-reference/grant-events-api/pricing-units/create.md): Grant Events API > Pricing units
- [Retrieve a pricing unit](https://docs.trygrant.com/api-reference/grant-events-api/pricing-units/get.md): Grant Events API > Pricing units
- [Update a pricing unit](https://docs.trygrant.com/api-reference/grant-events-api/pricing-units/update.md): Grant Events API > Pricing units
- [Delete a pricing unit](https://docs.trygrant.com/api-reference/grant-events-api/pricing-units/delete.md): Grant Events API > Pricing units
- [Create a pricing unit conversion rate](https://docs.trygrant.com/api-reference/grant-events-api/pricing-unit-conversion-rates/create-conversion-rate.md): Grant Events API > Pricing unit conversion rates
- [Update a pricing unit conversion rate](https://docs.trygrant.com/api-reference/grant-events-api/pricing-unit-conversion-rates/update-conversion-rate.md): Grant Events API > Pricing unit conversion rates
- [Delete a pricing unit conversion rate](https://docs.trygrant.com/api-reference/grant-events-api/pricing-unit-conversion-rates/delete-conversion-rate.md): Grant Events API > Pricing unit conversion rates
- [List available pricing catalogs](https://docs.trygrant.com/api-reference/grant-events-api/catalogs/list.md): Grant Events API > Catalogs
- [List catalog entries](https://docs.trygrant.com/api-reference/grant-events-api/catalogs/list-entries.md): Grant Events API > Catalogs
- [Create a subscription signup link](https://docs.trygrant.com/api-reference/grant-events-api/subscription-signup-links/create.md): Grant Events API > Subscription Signup Links

## OpenAPI Specification

- [OpenAPI JSON](https://docs.trygrant.com/openapi.json): raw OpenAPI 3.1 specification for this API, JSON format
- [OpenAPI YAML](https://docs.trygrant.com/openapi.yaml): raw OpenAPI 3.1 specification for this API, YAML format