# Agent-ready SDKs and API clients Home > Browse > SDKs and API clients 874 verified SDKs and API clients sites, 304 of them transactable — every one probed live, with the date it was checked. Figures generated 2026-09-27T07:19:26.699Z Checks passed across the 926 probed hosts: Markdown negotiation 733 · Markdown twin at a predictable URL 682 · llms.txt 878 · API catalog 91 · MCP server card answers 812. - [Mewayz](https://knowngood.sh/site/app.mewayz.com) Mewayz is an all-in-one business management platform offering over 144 modules including CRM, HRM, accounting, projects, and POS. - [Mewayz](https://knowngood.sh/site/seemless.link) Mewayz is an all-in-one business management platform offering over 144 modules including CRM, HRM, accounting, projects, and POS. - [Bauer-Solar](https://knowngood.sh/site/bauer-solar.de) Bauer-Solar is a German solar module manufacturer established in 2003, offering premium photovoltaic modules with extensive warranties and international projects. - [BestBox](https://knowngood.sh/site/bestbox.be) BestBox offers high-speed seedbox hosting packages with bandwidth from 500Mbit to 10Gbit and included monthly storage. - [KYE Protocol](https://knowngood.sh/site/kyeprotocol.com) KYE Protocol provides an authority API that verifies and enforces allowed AI agent actions with signed, offline-verifiable receipts. - [Coalesce Documentation](https://knowngood.sh/site/preview-docs.coalesce.io) Documentation for Coalesce Transform, Catalog, Marketplace, and APIs including setup, guides, and references. - [Extrovert API](https://knowngood.sh/site/api-docs.goextrovert.com) Extrovert API documentation provides REST API and webhooks for integrating Extrovert with tools and workflows. - [FlowRelay](https://knowngood.sh/site/flowrelay.app) FlowRelay triggers Shopify Flow from authenticated external webhooks, validating events and providing handoff receipts and diagnostics. - [TranscriptAPI](https://knowngood.sh/site/transcriptapi.com) TranscriptAPI provides a REST API for extracting YouTube transcripts, searching videos, browsing channels, and extracting playlists. - [Datafirefly](https://knowngood.sh/site/www.datafirefly.com) DataFirefly offers premium e-commerce modules and plugins for PrestaShop, WordPress/WooCommerce, Shopify, and Shopware with support and updates. - [AdCP](https://knowngood.sh/site/adcp-docs-ja.pier1.co.jp) AdCP documentation explains an open agent advertising standard covering discovery, account setup, and campaign lifecycle across multiple media channels. - [Agent Client Protocol](https://knowngood.sh/site/agentclientprotocol.com) Documentation for the Agent Client Protocol standardizing communication between code editors and coding agents for local and remote use. - [Agent Companies](https://knowngood.sh/site/agentcompanies.io) Agent Companies is a vendor-neutral protocol for describing portable AI companies using markdown packages. - [AgentSIM](https://knowngood.sh/site/agentsim.dev) AgentSIM provides a control plane for authorized testing of SMS OTP workflows using programmable US test numbers via SDKs and APIs. - [Kinsta API (1.106.0)](https://knowngood.sh/site/api-docs.kinsta.com) Kinsta API documentation provides REST API reference, endpoint schemas, usage examples, and a downloadable OpenAPI specification. - [Rhombus Developer Documentation](https://knowngood.sh/site/api-docs.rhombus.community) Developer documentation for Rhombus platform providing REST API for cameras, access control, sensors, alarms, and analytics integrations. - [AO Docs Documentation](https://knowngood.sh/site/api.aodocs.com) The AODocs REST API documentation provides details to implement custom applications, third-party integration, and bulk tools using AODocs features. - [SmartLead API](https://knowngood.sh/site/api.smartlead.ai) SmartLead API enables automation of cold email campaigns, lead management, email account rotation, and performance tracking programmatically. - [Teamcamp API Document](https://knowngood.sh/site/api.teamcamp.app) Documentation for Teamcamp's REST API including authentication, base URL, and response codes. - [WunderGraph](https://knowngood.sh/site/cosmo-docs.wundergraph.com) WunderGraph Cosmo is a full lifecycle GraphQL API management solution for federated graphs with composition checks, routing, analytics, and tracing. - [Le Lab Quantique Developers](https://knowngood.sh/site/dev.lelabquantique.com) Le Lab Quantique provides a GraphQL API with documentation for querying partners, jobs board, and posts data. - [Instantly API Docs](https://knowngood.sh/site/developer.instantly.ai) Documentation for Instantly API v2 to build integrations, manage email accounts, campaigns, leads, and receive webhook events. - [PriceEdge API Documentation](https://knowngood.sh/site/developer.priceedge.com) Documentation for integrating PriceEdge API to authenticate, read, update table data, and receive real-time webhook updates. - [Rollfi](https://knowngood.sh/site/developer.rollfi.xyz) Comprehensive documentation for Rollfi Payroll APIs covering company and employee onboarding, payroll processing, portals, and webhooks. - [amber Developer Portal](https://knowngood.sh/site/developers.ambersearch.de) Official developer portal providing REST API documentation and support resources for amber search solutions. More in Developer APIs & infrastructure: - [payments](https://knowngood.sh/category/payments) - [e-signatures](https://knowngood.sh/category/e-signatures) - [AI agents](https://knowngood.sh/category/ai-agents) - [conversational and voice AI](https://knowngood.sh/category/conversational-voice-ai) - [generative media](https://knowngood.sh/category/generative-media) - [blockchain and web3](https://knowngood.sh/category/blockchain-web3) - [email and messaging](https://knowngood.sh/category/email-messaging) - [search and data APIs](https://knowngood.sh/category/search-data-apis) - [analytics and observability](https://knowngood.sh/category/analytics-observability) - [databases and storage](https://knowngood.sh/category/databases-storage) - [cloud and hosting](https://knowngood.sh/category/cloud-hosting) - [security and identity](https://knowngood.sh/category/security-identity) - [extensions and plugins](https://knowngood.sh/category/extensions-plugins) - [embedded devices and firmware](https://knowngood.sh/category/embedded-devices-firmware) - [programming languages and frameworks](https://knowngood.sh/category/programming-languages-frameworks) - [build and test tooling](https://knowngood.sh/category/build-test-tooling) - [developer platforms](https://knowngood.sh/category/developer-platforms) - [ecommerce infrastructure](https://knowngood.sh/category/ecommerce-infrastructure) Browse: https://knowngood.sh/browse Directory: https://knowngood.sh/directory Vocabulary version: 2026-09-02.v1