Developer Tools & APIs

Math Tools

Numbers API

Math tools site with a REST API and calculators.

Math.js

JavaScript math library

Math library for JavaScript and Node.js.

Matrix

Secure messaging protocol

Open network for secure, decentralized communication.

MeetStream

Meeting bot API

API for meeting bots that join, record, and stream calls.

MeldAPI

No-code integrations

Sync data and digital assets between apps.

Mend.io

AppSec platform

Unified application and AI security platform.

Mergewise

Task-aware code review

Code review with task context for GitHub teams.

MindStudio

AI agent builder

No-code tools for building and deploying AI agents.

MLflow

MLOps platform

Open source platform for agents, LLMs, and ML models.

mockAPI

API mocking

Mock APIs and generate custom data.

Mockfly

Mock API hosting

Create hosted mock REST APIs for development teams.

Mocko

HTTP mocking

Create and share mock APIs for REST development.

Moorcheh

AI search stack

Sovereign AI search stack for regulated enterprises

Muapi

Generative AI API

API platform for generative media models.

Muna

Model inference API

API for open models compatible with OpenAI and Anthropic.

MySpec

Spec-driven development

Creates structured specs before AI coding work begins.

n1n.ai

LLM API gateway

Unified API gateway for multiple AI models.

Nationalize

Nationality inference

API to predict nationality from a name

Netdata

Infrastructure monitoring

Real-time observability for metrics, logs, and traces.

Newsflash

Agent news search

Breaking news queryable by agents over MCP, CLI, or HTTP.

Nhost

Backend as a service

Managed backend platform with Postgres and APIs.

Noms

Food data API

API data layer for food apps.

Not Human Search

Agent readiness

Search and score sites for AI-agent readiness.

NOWNodes

Blockchain RPC API

Blockchain nodes and RPC API for many networks.

ntail

Serverless Kafka

Serverless Kafka with pay-as-you-go pricing for teams.

Nutrient

PDF SDKs

Document and PDF SDKs and APIs for agent workflows.

Nx Cloud

Monorepo CI

Cloud CI and caching for monorepo development teams.

Obsidian

Note taking app

Flexible note-taking app for personal knowledge work.

OCRSpace

OCR text extraction

OCR API for images, PDFs, and searchable PDFs.

Odds API

Sports odds API

Real-time sports odds data API for developers.

OODA

All-in-one AI platform

All-in-one AI platform with one API.

OpenMetadata

Data catalog

Open-source context layer for data and AI.

OpenAPI Generator

API code generation

Generate clients, servers, and docs from OpenAPI files.

Open Brewery DB

Brewery API

Open dataset and API for brewery data.

OpenChamber

Agentic dev environment

Agentic development environment for AI coding.

OpenF1

F1 data API

Open API for Formula 1 data and telemetry.

OpenGraph.io

URL intelligence API

Developer APIs for previews, metadata, screenshots, and embeds.

OpenIndex Wiki

AI knowledge wiki

Wiki for AI agents to read, search, and write.

OpenObserve

Observability platform

Unified observability for logs, metrics, and traces.

OpenRouter

Model gateway

Unified interface for many AI models.

openrouteservice

Routing API

Routing, geocoding, and optimization tools for maps.

OpenTiendas

E-commerce API

API and webhooks for OpenTiendas e-commerce.

Openwork

AI agent platform

Deploy AI agents and run missions.

Operating

PSA for consulting

PSA platform for consulting firms.

Orgo

AI agent desktops

Run AI agents on always-on desktops.

Orkas

AI agent orchestration

Direct AI agents by chat for business tasks.

Osmo Supply

Webflow toolkit

Toolkit with Webflow and HTML resources for creative developers.

Owl Protocol

Web3 API platform

API platform for Web3 applications.