Libraries tagged by idempotency-key

Generate reproducible idempotency keys from any data format (JSON, XML, YAML, arrays, objects) regardless of key order

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Safe request retries for Laravel APIs via the Idempotency-Key header.

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Idempotency key middleware for Yii3 APIs

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Welcome to the Svix API documentation! Useful links: [Homepage](https://www.svix.com) | [Support email](mailto:[email protected]) | [Blog](https://www.svix.com/blog/) | [Slack Community](https://www.svix.com/slack/) # Introduction This is the reference documentation and schemas for the [Svix webhook service](https://www.svix.com) API. For tutorials and other documentation please refer to [the documentation](https://docs.svix.com). ## Main concepts In Svix you have four important entities you will be interacting with: - `messages`: these are the webhooks being sent. They can have contents and a few other properties. - `application`: this is where `messages` are sent to. Usually you want to create one application for each user on your platform. - `endpoint`: endpoints are the URLs messages will be sent to. Each application can have multiple `endpoints` and each message sent to that application will be sent to all of them (unless they are not subscribed to the sent event type). - `event-type`: event types are identifiers denoting the type of the message being sent. Event types are primarily used to decide which events are sent to which endpoint. ## Authentication Get your authentication token (`AUTH_TOKEN`) from the [Svix dashboard](https://dashboard.svix.com) and use it as part of the `Authorization` header as such: `Authorization: Bearer ${AUTH_TOKEN}`. For more information on authentication, please refer to the [authentication token docs](https://docs.svix.com/api-keys). ## Code samples The code samples assume you already have the respective libraries installed and you know how to use them. For the latest information on how to do that, please refer to [the documentation](https://docs.svix.com/). ## Idempotency Svix supports [idempotency](https://en.wikipedia.org/wiki/Idempotence) for safely retrying requests without accidentally performing the same operation twice. This is useful when an API call is disrupted in transit and you do not receive a response. To perform an idempotent request, pass the idempotency key in the `Idempotency-Key` header to the request. The idempotency key should be a unique value generated by the client. You can create the key in however way you like, though we suggest using UUID v4, or any other string with enough entropy to avoid collisions. Svix's idempotency works by saving the resulting status code and body of the first request made for any given idempotency key for any successful request. Subsequent requests with the same key return the same result. Please note that idempotency is only supported for `POST` requests. ## Cross-Origin Resource Sharing This API features Cross-Origin Resource Sharing (CORS) implemented in compliance with [W3C spec](https://www.w3.org/TR/cors/). And that allows cross-domain communication from the browser. All responses have a wildcard same-origin which makes them completely public and accessible to everyone, including any code on any site.

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RevKeen is a fintech-grade API for payments, subscriptions, invoices, and billing. The canonical production MCP server is available at `https://mcp.revkeen.com/mcp`. **API Version:** `2026-05-01` — Pin with the `RevKeen-Version` header. **Quick Links:** [Full Documentation](https://docs.revkeen.com) | [Authentication](https://docs.revkeen.com/authentication) | [OAuth](https://docs.revkeen.com/oauth) | [SDKs](https://docs.revkeen.com/sdks) | [Webhooks](#webhooks) | [MCP Guide](https://docs.revkeen.com/mcp) ## Authentication Two authentication methods are supported: ### API Keys (recommended for server-to-server REST API integrations) Send your API key in the `x-api-key` header. Get keys from the [Dashboard](https://app.revkeen.com/settings/api-keys). Use `rk_sandbox_*` for test mode and `rk_live_*` for production. ### OAuth 2.1 (recommended for MCP and third-party integrations) Use OAuth 2.1 with PKCE for authorization code flow or client credentials for server-to-server. Tokens are sent via `Authorization: Bearer rk_oauth_*`. See the [OAuth guide](https://docs.revkeen.com/oauth) for setup. - **Authorization Code + PKCE** — user-facing integrations, MCP hosts - **Client Credentials** — server-to-server, automated workflows - **Dynamic Client Registration** — MCP hosts that auto-register ## MCP Integration RevKeen's canonical production MCP server is `https://mcp.revkeen.com/mcp` using Streamable HTTP and OAuth 2.1 bearer tokens. - **Customer launch surface** — read-first customer v1 tools with least-privilege scopes - **Host setup guide** — see the [MCP guide](https://docs.revkeen.com/mcp) for ChatGPT, Claude, and compatible MCP hosts ## API Key Scopes Scopes follow `{resource}:{action}` format (e.g., `invoices:read`, `customers:*`). See [full scope reference](https://docs.revkeen.com/authentication#scopes). | Category | Scope | Description | |----------|-------|-------------| | **Payments & Checkout** | `checkout:read` | View checkout session details | | | `checkout:write` | Create and manage checkout sessions | | | `cart:read` | View cart session details (REV-3511) | | | `cart:write` | Create and mutate cart sessions, line items, add-ons (REV-3511) | | | `payment_links:read` | View payment links | | | `payment_links:write` | Create and manage payment links | | | `charges:read` | View one-time charges | | | `charges:write` | Create one-time charges for customers | | | `payments:read` | View payment details | | | `payments:write` | Capture or void payments | | | `payment_intents:read` | View payment intent details | | | `payment_intents:write` | Create, confirm, capture, and cancel payment intents | | | `setup_intents:read` | View setup intent details | | | `setup_intents:write` | Create, confirm, and cancel setup intents | | | `payment_methods:read` | View saved payment methods | | | `payment_methods:write` | Attach and detach payment methods | | **Billing** | `invoices:read` | View invoices | | | `invoices:write` | Create, update, and manage invoices | | | `subscriptions:read` | View subscriptions | | | `subscriptions:write` | Create, update, pause, and cancel subscriptions | | | `subscription_schedules:read` | View subscription schedule details | | | `subscription_schedules:write` | Create, update, cancel, and release subscription schedules | | | `orders:read` | View orders | | | `orders:write` | Create and manage orders | | | `credit_notes:read` | View credit notes | | | `credit_notes:write` | Create and void credit notes | | **Products & Pricing** | `products:read` | View product catalog | | | `products:write` | Create and update products | | | `prices:read` | View pricing information | | | `prices:write` | Create and update prices | | | `discounts:read` | View discount codes | | | `discounts:write` | Create and manage discount codes | | | `tax_rates:read` | View tax rate configurations | | | `tax_rates:write` | Configure tax rates | | **Usage & Metering** | `meters:read` | View meter configurations | | | `meters:write` | Create and update meters | | | `usage:read` | View usage events and balances | | | `usage:write` | Ingest usage events | | **Customers** | `customers:read` | View customer information | | | `customers:write` | Create and update customers | | | `entitlements:read` | View customer entitlements / feature access | | | `entitlements:write` | Grant and revoke customer entitlements | | | `businesses:read` | View business entities | | | `businesses:write` | Manage business entities | | **Money Movement** | `refunds:read` | View refund details | | | `refunds:write` | Issue refunds | | | `voids:read` | View voided transactions | | | `voids:write` | Void unsettled transactions | | | `disputes:read` | View chargebacks and disputes | | | `disputes:write` | Respond to disputes | | | `payouts:read` | View payout and settlement data | | **Direct Debit** | `mandates:read` | View Direct Debit mandates and collection status | | | `mandates:write` | Create, suspend, reinstate, and cancel Direct Debit mandates | | **Terminal** | `terminal:read` | View terminal devices and card-present payments | | | `terminal:write` | Initiate, cancel, refund, and void terminal payments | | **Data Exchange** | `exports:read` | View and download data exports | | | `exports:write` | Create data exports | | | `imports:read` | View import status and history | | | `imports:write` | Upload and run data imports | | **Analytics & Reporting** | `analytics:read` | View analytics and reports | | | `finance:read` | View financial reports | | **Communication** | `comms:read` | View SMS and email delivery logs | | | `comms:write` | Send SMS, email, and WhatsApp messages | | | `automations:read` | View automations, runs, approvals, and traces | | | `automations:write` | Create automations and trigger runs | | **Integrations** | `apps:read` | View connected applications | | | `apps:write` | Manage app connections | | | `webhooks:read` | View webhook endpoints | | | `webhooks:write` | Manage webhook endpoints | | | `integrations:read` | View integration status and sync logs | | | `integrations:write` | Activate, configure, and sync integrations | | | `events:read` | View webhook event logs | | | `events:write` | Resend and test webhook events | | | `sync:read` | View sync watermarks and state | | | `sync:write` | Update sync watermarks | ## Environments | Environment | Base URL | API Key Prefix | |-------------|----------|----------------| | **Staging** | `https://staging-api.revkeen.com/v2` | `rk_sandbox_*` | | **Production** | `https://api.revkeen.com/v2` | `rk_live_*` | ## Idempotency Include `Idempotency-Key` header (UUID) on mutation requests. Keys are valid for 24 hours. ## Rate Limits | Plan | Requests/min | Burst | |------|-------------|-------| | **Staging** | 100 | 200 | | **Production** | 1000 | 2000 | | **Enterprise** | Custom | Custom |

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Laravel middleware and drivers for handling Idempotency Keys (Cache, Database, Redis).

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A Laravel library that manages idempotency keys for a request

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Stripe-style Idempotency-Key middleware for multi-tenant Laravel APIs.

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Idempotency key support to help prevent duplicate form submissions

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Stripe-style Idempotency-Key middleware for Laravel APIs with response replay and concurrent locks

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Laravel middleware implementing the IETF Idempotency-Key HTTP header draft.

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Framework-agnostic implementation of the IETF Idempotency-Key HTTP header draft (PSR-7/PSR-15).

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HTTP request idempotency for Symfony using Idempotency-Key, request fingerprints, shared state, and Symfony Lock.

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Stripe-style Idempotency-Key middleware for Laravel APIs with response replay and concurrent locks

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Stripe-style Idempotency-Key primitive for Univeros: storage contract, adapters, and (in companion packages) PSR-15 middleware + spec block.

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