Specialized AI agents for backend engineers: Browse our marketplace of assistants recommended by leading AI automation agency partners.

AI Agents for backend engineers | AI Agent Store

x402 is an open, internet-native payment protocol that activates the long-reserved HTTP 402 “Payment Required” status code to handle payments directly inside web and API requests. It allows AI agents, apps, and APIs to charge and pay per request using stablecoins like USDC, removing the need for traditional API keys, subscriptions, or manual billing. Built as an open standard by Coinbase and deployed on chains such as Solana and Base, x402 supports low-cost, high-throughput micropayments suitable for agentic workflows, data APIs, model inference, and digital content. By embedding pricing, payment instructions, and proof of payment in normal HTTP flows, x402 enables fully autonomous, machine-to-machine commerce and a more granular, usage-based business model for online services.

x402 Protocol

x402-protocol

Open payment protocol that lets AI agents and APIs send instant stablecoin micropayments over HTTP using the 402 status code.

1Shot API is an onchain automation layer that turns smart contracts into easily callable tools for apps, workflows, and AI-driven systems. It provides managed wallets, transaction orchestration, and support for standards like x402 payments and MetaMask Delegation Framework, so you can send stablecoin payments, automate onchain actions, and trigger transactions from platforms like n8n, Make, and IFTTT. Developers can read and write to any supported EVM smart contract, estimate gas, batch calls, and receive webhooks when transactions are finalized. 1Shot Prompts adds annotated smart contract prompts that make it easier for AI systems to reason about contract methods, enabling safer, autonomous onchain execution.

1Shot API

1shot-api

Onchain automation layer that lets AI agents and workflows read, write, and pay with smart contracts via a managed wallet API.

Kilo Code is an open-source AI coding assistant designed to run inside VS Code, JetBrains IDEs, and web-based editors. Built as a full coding agent, it can plan features, generate new code from natural language, refactor and debug existing projects, run terminal commands, and even automate the browser with user approval. Kilo Code combines ideas from tools like Cline and Roo into a unified workflow with dedicated modes such as Architect, Coder, and Debugger. It connects to 400+ frontier and open models through OpenRouter and similar providers, offers optional hosted credits so developers can start without managing their own API keys, and supports an MCP-style server marketplace for extending the agent with custom tools. This makes it a flexible choice for individual developers and teams who want powerful AI assistance while keeping configuration transparent and community-driven.

Kilo Code

kilo-code

Open-source AI coding assistant for VS Code and JetBrains that plans, writes, and debugs code with multi-model support.

Keploy is an open‑source AI test automation agent that uses eBPF to record live traffic and generate deterministic unit, integration, and API tests with mocks/stubs. It integrates with CI/CD, supports multiple languages, and uses multi‑model LLMs for test generation and self‑healing.

Keploy

keploy

An open‑source AI agent that auto‑generates and maintains unit, integration, and API tests with mocks.

Blinky is an open-source AI debugging agent integrated into Visual Studio Code (VSCode). It leverages Large Language Models (LLMs) to help developers identify and fix backend code errors efficiently. By utilizing the VSCode API, Language Server Protocol (LSP), and print statement debugging, Blinky triangulates and addresses bugs in real-world backend systems. The agent operates through an interactive chat interface within VSCode, allowing developers to describe issues, specify reproduction steps, and provide feedback during the debugging process. Inspired by SWE-agent, Blinky aims to enhance the debugging experience by automating error detection and correction.

Blinky: AI Debugging Agent

blinky-ai-debugging-agent

An open-source AI debugging agent for VSCode that uses LLMs to identify and fix backend code errors.

Pydantic is a robust data validation and settings management library for Python that leverages type hints to define and validate data structures. By integrating seamlessly with Python's type annotations, Pydantic enables developers to define data schemas clearly and validate data efficiently. It supports complex nested data structures, custom data types, and integrates well with IDEs and static analysis tools, enhancing code reliability and maintainability. Pydantic is widely adopted in various industries and serves as the data backbone for frameworks like FastAPI.

Pydantic

pydantic

A Python library that provides data validation and settings management using Python type annotations.