feat(retell-ai): added retell ai support

docs-v2/integrations/all/retell-ai.mdx

@@ -0,0 +1,53 @@
+---
+title: Retell AI
+sidebarTitle: Retell AI
+provider: retell-ai
+---
+
+import Overview from "/snippets/overview.mdx";
+import PreBuiltTooling from "/snippets/generated/retell-ai/PreBuiltTooling.mdx";
+import PreBuiltUseCases from "/snippets/generated/retell-ai/PreBuiltUseCases.mdx"
+
+<Overview />
+<PreBuiltTooling />
+<PreBuiltUseCases />
+
+## Access requirements
+| Pre-Requisites | Status | Comment|
+| - | - | - |
+| Paid dev account | ✅ | Required for API access |
+| Paid test account | ✅ | Available for testing purposes |
+| Partnership | ❌ | Not required |
+| App review | ❌ | Not required |
+| Security audit | ❌ | Not required |
+
+## Setup guide
+
+1. **Create an account**: Sign up for a Retell AI account at [Retell AI](https://www.retellai.com/).
+2. **Generate an API key**: Navigate to your workspace settings and generate an API key. This key will be used for authentication.
+3. **Configure your integration**: Use the API key in your requests by including it in the `Authorization` header as a Bearer token.
+4. **Test your integration**: Use the `/v1/agent` endpoint to verify your setup.
+
+<Tip>Need help getting started? Get help in the [community](https://nango.dev/slack).</Tip>
+
+<Note>Contribute improvements to the setup guide by [editing this page](https://github.com/nangohq/nango/tree/master/docs-v2/integrations/all/retell-ai.mdx)</Note>
+
+## Useful links
+
+-   [Retell AI API Documentation](https://docs.retellai.com/api-references)
+-   [Authentication Guide](https://docs.retellai.com/accounts/api-keys-overview)
+-   [API Playground](https://docs.retellai.com/test/llm_playground)
+
+<Note>Contribute useful links by [editing this page](https://github.com/nangohq/nango/tree/master/docs-v2/integrations/all/retell-ai.mdx)</Note>
+
+## API gotchas
+
+-   **API Key Security**: Never expose your API key in client-side code or public repositories. Always use environment variables or secure storage.
+-   **Rate Limits**: Be mindful of API rate limits. Check the [API documentation](https://docs.retellai.com/deploy/concurrency#understand-concurrency-and-limits) for details.
+-   **Webhook Security**: Use the designated webhook API key for signing and verifying webhook requests to ensure they are legitimate.
+
+<Note>Contribute API gotchas by [editing this page](https://github.com/nangohq/nango/tree/master/docs-v2/integrations/all/retell-ai.mdx)</Note>
+
+<Card title="Connect to Retell Ai" icon="link" href="/integrations/all/retell-ai/connect" horizontal>
+  Guide to connect to Retell Ai using Nango Connect.
+</Card>

docs-v2/integrations/all/retell-ai/connect.mdx

@@ -0,0 +1,40 @@
+---
+title: Retell AI - How do I link my account?
+sidebarTitle: Retell AI
+---
+
+# Overview
+
+To authenticate with Retell AI, you need one piece of information:
+1. **API Key** - Your Retell AI API Key
+
+This guide will walk you through finding or creating your API key within Retell AI.
+
+### Prerequisites:
+
+- You must have a Retell AI account. If you don’t have one, sign up at [Retell AI](https://www.retellai.com/).
+
+---
+
+#### Step 1: Finding Your Retell AI API Key
+
+1. **Log in to Retell AI**: Go to the [Retell AI Dashboard](https://dashboard.retellai.com/) and log in with your credentials.
+
+2. **Navigate to API Keys**: In the dashboard, scroll through the menu and select **API Keys** .
+
+   <img src="/integrations/all/retell-ai/retell-1.png" alt="Retell AI API Keys Menu" />
+
+3. **Getting your API Key**: Your key should already be generated by the system.
+
+4. **Securely Copy Your API Key**: Clicking the view iconbutton and securely copy it.
+
+---
+
+#### Step 2: Connect Your Retell AI Account
+
+To authenticate using your API key, navigate to the Retell AI authentication form in Nango. Enter your credentials as follows:
+- **API Key**: Paste the API key you copied in Step 1.
+
+Click **Connect** to complete the authentication.
+
+---

docs-v2/mint.json

@@ -450,6 +450,7 @@
                 "integrations/all/recharge",
                 "integrations/all/refiner",
                 "integrations/all/replicate",
+                "integrations/all/retell-ai",
                 "integrations/all/ring-central",
                 "integrations/all/sage",
                 "integrations/all/salesforce",

docs-v2/snippets/generated/retell-ai/PreBuiltTooling.mdx

@@ -0,0 +1,40 @@
+## Pre-built tooling
+<AccordionGroup>
+<Accordion title="✅ Authorization">
+| Tools | Status |
+| - | - |
+| Pre-built authorization (API Key) | ✅ |
+| Pre-built authorization UI | ✅ |
+| Custom authorization UI | ✅ |
+| End-user authorization guide | ✅ |
+| Expired credentials detection | ✅ |
+</Accordion>
+<Accordion title="✅ Read & write data">
+| Tools | Status |
+| - | - |
+| Pre-built integrations | 🚫 (time to contribute: &lt;48h) |
+| API unification | ✅ |
+| 2-way sync | ✅ |
+| Webhooks from Nango on data modifications | ✅ |
+| Real-time webhooks from 3rd-party API | 🚫 (time to contribute: &lt;48h) |
+| Proxy requests | ✅ |
+</Accordion>
+<Accordion title="✅ Observability & data quality">
+| Tools | Status |
+| - | - |
+| HTTP request logging | ✅ |
+| End-to-type type safety | ✅ |
+| Data runtime validation | ✅ |
+| OpenTelemetry export | ✅ |
+| Slack alerts on errors | ✅ |
+| Integration status API | ✅ |
+</Accordion>
+<Accordion title="✅ Customization">
+| Tools | Status |
+| - | - |
+| Create or customize use-cases | ✅ |
+| Pre-configured pagination | 🚫 (time to contribute: &lt;48h) |
+| Pre-configured rate-limit handling | 🚫 (time to contribute: &lt;48h) |
+| Per-customer configurations | ✅ |
+</Accordion>
+</AccordionGroup>

docs-v2/snippets/generated/retell-ai/PreBuiltUseCases.mdx

@@ -0,0 +1,5 @@
+## Pre-built integrations
+
+_No pre-built integration yet (time to contribute: <48h)_
+
+<Tip>Not seeing the integration you need? [Build your own](https://docs.nango.dev/guides/custom-integrations/overview) independently.</Tip>

packages/providers/providers.yaml

@@ -6009,6 +6009,27 @@ replicate:
             title: API Key
             description: The API key for your Replicate account
 
+retell-ai:
+    display_name: Retell AI
+    categories:
+        - dev-tools
+        - productivity
+    auth_mode: API_KEY
+    proxy:
+        base_url: https://api.retellai.com
+        headers:
+            authorization: Bearer ${apiKey}
+            content-type: application/json
+    docs: https://docs.nango.dev/integrations/all/retell-ai
+    docs_connect: https://docs.nango.dev/integrations/all/retell-ai/connect
+    credentials:
+        apiKey:
+            type: string
+            title: API Key
+            description: The API key for Retell AI
+            example: key-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+            doc_section: '#step-1-finding-your-retell-ai-api-key'
+
 ring-central:
     display_name: RingCentral
     categories: