# InfoLang Inc. Billing API

**Canonical:** https://apis.io/apis/infolang-ai/infolang-ai-billing-api/  
**Provider:** InfoLang Inc. — https://apis.io/providers/infolang-ai/  
**Base URL:** https://api.infolang.ai  
**Documentation:** https://docs.infolang.ai/api-reference

InfoLang Inc. Billing API is one of 22 APIs that [InfoLang Inc.](https://apis.io/providers/infolang-ai/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Billing. The published artifact set on APIs.io includes an OpenAPI specification.

The published plan catalog, Stripe checkout and customer-portal links, plus the webhook sink. `GET /v2/plans` is the one PUBLIC route here — a catalog is the same for everybody, and a client that cannot read prices without a credential goes back to hard-coding them. Everything else is session-only; mutations require Admin.

## Operations (14)

| Method | Path | Summary |
|---|---|---|
| POST | `/v2/workspaces/{id}/billing/checkout` | Start checkout for a workspace |
| POST | `/v2/workspaces/{id}/billing/plan` | Switch an existing subscription to another plan |
| POST | `/v2/workspaces/{id}/billing/cancel` | Cancel the subscription at the end of the paid period |
| POST | `/v2/workspaces/{id}/billing/portal` | Open the billing portal for a workspace |
| GET | `/v2/workspaces/{id}/billing` | Billing summary for a workspace |
| GET | `/v2/plans` | The published plan catalog |
| GET | `/v2/billing` | Billing summary for the caller's billing account |
| POST | `/v2/billing/checkout` | Start checkout (principal-scoped) |
| POST | `/v2/billing/plan` | Switch an existing subscription to another plan (principal-scoped) |
| POST | `/v2/billing/cancel` | Cancel the subscription at the end of the paid period |
| POST | `/v2/billing/portal` | Open the billing portal (principal-scoped) |
| GET | `/v2/billing/budget` | The account's monthly overage budget |
| PUT | `/v2/billing/budget` | Set the account's monthly overage budget |
| POST | `/webhooks/stripe` | Stripe webhook |

## Machine-readable artifacts (1)

- **OpenAPI** — https://artifacts.apis.io/infolang-ai/openapi/infolang-ai-billing-api-openapi.yml

## Other InfoLang Inc. APIs (12)

- [InfoLang Inc. Activity API](https://apis.io/apis/infolang-ai/infolang-ai-activity-api/)
- [InfoLang Inc. Canon API](https://apis.io/apis/infolang-ai/infolang-ai-canon-api/)
- [InfoLang Inc. Connectors API](https://apis.io/apis/infolang-ai/infolang-ai-connectors-api/)
- [InfoLang Inc. Correspondences API](https://apis.io/apis/infolang-ai/infolang-ai-correspondences-api/)
- [InfoLang Inc. Disclosures API](https://apis.io/apis/infolang-ai/infolang-ai-disclosures-api/)
- [InfoLang Inc. Health API](https://apis.io/apis/infolang-ai/infolang-ai-health-api/)
- [InfoLang Inc. Identity API](https://apis.io/apis/infolang-ai/infolang-ai-identity-api/)
- [InfoLang Inc. Ingest API](https://apis.io/apis/infolang-ai/infolang-ai-ingest-api/)
- [InfoLang Inc. Inquiries API](https://apis.io/apis/infolang-ai/infolang-ai-inquiries-api/)
- [InfoLang Inc. Kairos passthrough API](https://apis.io/apis/infolang-ai/infolang-ai-kairos-passthrough-api/)
- [InfoLang Inc. Keys API](https://apis.io/apis/infolang-ai/infolang-ai-keys-api/)
- [InfoLang Inc. Members API](https://apis.io/apis/infolang-ai/infolang-ai-members-api/)

## Tags

Billing

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/infolang-ai/infolang-ai-billing-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/infolang-ai/.