> ## Documentation Index > Fetch the complete documentation index at: https://docs.decimal.ai/llms.txt > Use this file to discover all available pages before exploring further. # Confirm a completed Stripe Checkout session and sync the plan > Authoritative answer to "did my upgrade land?" for the page the browser returns to after Stripe Checkout. The success redirect races the checkout.session.completed webhook, so the billing page must not celebrate off a URL parameter alone (audit 2026-08-14: "Plan upgraded successfully!" rendered above "Current plan: Free"). This retrieves the session, verifies it belongs to the caller's org, applies the grant if the webhook hasn't yet, and returns the org's actual plan. Deliberately NOT admin-gated: it grants only what a completed Stripe session already proves was bought. ## OpenAPI ````yaml /openapi.json get /api/v1/billing/checkout/confirm openapi: 3.1.0 info: title: DecimalAI Platform description: Agent Dataset Lifecycle Platform — Backend API version: 0.1.0 servers: - url: https://api.decimal.ai description: Production security: - BearerAuth: [] tags: - name: traces description: >- Ingest, search, and inspect agent execution traces. A trace is the atomic unit of the platform — every other feature (evaluation, compatibility scoring, dataset building) operates on traces. Each trace is auto-tagged with the manifest hash of the agent that produced it. - name: eval-scores description: >- Push, fetch, and aggregate per-trace evaluation scores. Scores carry source provenance (built-in, DeepEval, LangSmith, custom) and feed the unified decision engine, which produces a keep / repair / replay / drop verdict per trace. - name: skills description: >- Manage reusable instruction blocks (SKILL.md files) that modify agent behavior. Skills are first-class manifest components — changes to a skill appear in your regression-check impact reports. Use these endpoints to create, version, fork, and sync skills with your local SKILL.md files. - name: manifests description: >- Register and inspect manifest versions. A manifest is a snapshot of your agent's structural identity (tools, prompts, models, skills) at a point in time. The SDK registers manifests automatically; these endpoints expose the underlying records. - name: datasets description: >- Build versioned SFT/DPO training datasets from manifest-classified, eval-scored traces. Datasets are reproducible — each version locks the manifest and filter set used to build it. Export as JSONL, Parquet, or push to HuggingFace Hub. - name: replay description: >- Re-execute historical traces against a new manifest version. Replay is the deferred-future capability for behavioral verification of agent changes. The SDK creates a replay batch, your worker executes each task, then submits results back here for eval scoring. - name: registry description: >- Browse and install published skills from the public skills registry. Each registry skill carries a SkillScore — an evidence-tiered quality composite computed from real-world evals, benchmarks, and ratings across organizations. Installing creates a fork in your org — edits don't affect the public version. - name: agents description: >- List and inspect agents, plus their multi-agent topology (orchestrator → sub-agent edges discovered from traces). Agents are identified by a stable agent_name string set in your SDK init() call. - name: import description: >- Bulk-import historical traces from another observability platform or a JSONL backup. Useful for migrating from LangSmith / Braintrust / Langfuse. Duplicate trace IDs are silently skipped — re-running an import is safe. paths: /api/v1/billing/checkout/confirm: get: tags: - billing summary: Confirm a completed Stripe Checkout session and sync the plan description: >- Authoritative answer to "did my upgrade land?" for the page the browser returns to after Stripe Checkout. The success redirect races the checkout.session.completed webhook, so the billing page must not celebrate off a URL parameter alone (audit 2026-08-14: "Plan upgraded successfully!" rendered above "Current plan: Free"). This retrieves the session, verifies it belongs to the caller's org, applies the grant if the webhook hasn't yet, and returns the org's actual plan. Deliberately NOT admin-gated: it grants only what a completed Stripe session already proves was bought. operationId: confirm_checkout_api_v1_billing_checkout_confirm_get parameters: - name: session_id in: query required: true schema: type: string minLength: 8 maxLength: 255 description: cs_… id from the success redirect title: Session Id description: cs_… id from the success redirect - name: Authorization in: header required: false schema: type: string title: Authorization - name: decimal_session in: cookie required: false schema: anyOf: - type: string - type: 'null' title: Decimal Session responses: '200': description: Successful Response content: application/json: schema: {} '422': description: Validation Error content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' components: schemas: HTTPValidationError: properties: detail: items: $ref: '#/components/schemas/ValidationError' type: array title: Detail type: object title: HTTPValidationError ValidationError: properties: loc: items: anyOf: - type: string - type: integer type: array title: Location msg: type: string title: Message type: type: string title: Error Type input: title: Input ctx: type: object title: Context type: object required: - loc - msg - type title: ValidationError securitySchemes: BearerAuth: type: http scheme: bearer description: Enter your API key (e.g. dai_sk_test_key_001) ````