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Overview Blog Changelog

What is Primitive?
Quickstart
Agent Guide

Inbound and Outbound Email Model
Webhook Events Overview
x402 Payments Overview
Monorepo Structure and Release Process

What is the Primitive Node.js SDK?
Node.js SDK Quickstart
Node.js SDK Agent Guide
Sending, Replying, and Forwarding Email
Receiving Inbound Email
Verifying Inbound Email Authenticity
Request Options and Idempotency
Generated API Client and Primitive Memories
Agent Accounts
Webhook Signature Verification
Handling Payment and Interaction Webhook Events
Signed Download Tokens
Parsing Raw Email (.eml)
Bundling Attachments
Building Webhook Payloads (Contract Module)
Primitive Payloads: Streaming Large Attachments
Charging and Registering Payout Addresses
Paying a Challenge
Email-Native x402 Payments
Low-Level x402 Signing Primitives
Spend Policy and Payout Address Management

Node.js SDK Errors
Codegen Troubleshooting

Install and Configure the Python SDK
Client and Request Options
Sending Email
Replying and Forwarding
Receiving and Parsing Inbound Email
Verifying Webhook Signatures
Handling Webhook Events
Validating and Downloading Raw Email
Authenticating Senders with SPF, DKIM, and DMARC
Registering Payout Addresses and Spend Policy
Creating and Paying Challenges
Email-Native Payments (Python SDK)
Low-Level Payment Signing
Generated API Client (Python)
Python SDK Error Reference
Python SDK Type Reference

Go SDK Quickstart
Client and Configuration
Sending Emails (Go SDK)
Replying to Emails
Forwarding Emails
Context, Timeouts, and Cancellation
Receiving and Verifying Webhooks
Webhook Event Types
Validating Email Authenticity
Raw Email and Attachment Downloads
Webhook Payload Schema Validation
Registering a Payout Address
Creating a Payment Challenge (Go SDK)
x402 Signing Primitives (Go)
x402 Spend Policy (Go SDK)
x402 Errors
Semantic Search (Go SDK)
Error Handling
Go SDK Testing and Development

What is API Core?
Regenerating SDK Code from the OpenAPI Spec
Architecture: Shared Codegen Pipeline
OpenAPI Spec Normalization and Codegen Artifacts
Generated TypeScript Client Fixups
PrimitiveApiClient
Operation Manifest Reference
Memory Value Validation Helper
Non-TypeScript Codegen: Go and Python Clients
Webhook Schema Codegen

What is the Primitive CLI?
Inbox Setup and Status
Agent Account Upgrade from the CLI
Shell Completion and Endpoint Test Redirects

Primitive Functions and Recipient Routing

Quickstarts

Cap Docs Quickstarts

Runnable examples that help you get started with Cap Docs.

July 22, 2026

Twenty SDK Local Setup Example: Minimal App Against a Local Twenty Instance

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