Find services AI agents can actually use.
Search the agentic web for free. Compare services, APIs, and tools by machine-readable readiness. Organic rank is based on readiness, never payment.
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5748 sites found for "payment API"
Languagelayer API | Free, Reliable Language Detection API
languagelayer.com
Free, powerful language detection JSON API for 173 languages, supporting single and batch requests, PHP, JavaScript, Python, Ruby, Java, and more.
llms.txt
API
ai-tools
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Reliable Email Verification API - Mailboxlayer API Service
mailboxlayer.com
Simple and powerful email verification JSON API using SMTP, typo checks, syntax validation, and free and disposable provider filtering. Free for personal use.
llms.txt
API
communication
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Vatlayer API | VAT Number Validation & EU VAT Rates API
vatlayer.com
Free and HTTPS secured JSON API offering instant VAT number validation, reliable EU VAT rates and VAT compliant price calculations for developers & businesses.
llms.txt
API
finance
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
NYC API — Property, Violations & Permits in One Call
nycapi.app
Unified API for NYC property records, building violations, restaurant grades & permits. Joined across seven NYC agencies. Built for AI agents.
ai-plugin
OpenAPI
API
Schema.org
ai-tools
60
+20 ai-plugin
+20 OpenAPI
missing +25 llms.txt
Stock Market API | Massive
polygon.io
Stock API with real-time and historical tick data, unlimited usage via REST or WebSockets, standardized JSON and CSV formats. Instant access free tier.
llms.txt
ai-plugin
API
finance
60
+25 llms.txt
+20 ai-plugin
missing +20 OpenAPI
Rendex — HTML, PDF & Screenshot Rendering API for Developers & AI Agents
rendex.dev
Render HTML, a URL, or Markdown into images and PDFs with one POST. Built for n8n, Make, Zapier, and AI agents on MCP. Batch, signed webhooks, data templating, and official TypeScript & Python SDKs. Free tier included.
llms.txt
OpenAPI
API
AI bots
Schema.org
ai-tools
70
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
webclaw: Web Scraping API for LLMs and AI Agents
webclaw.io
Turn any website into LLM-ready markdown, JSON, or structured data. No browser, no Selenium. Handles bot protection. Returns static pages in around 118ms.
llms.txt
OpenAPI
API
AI bots
Schema.org
ai-tools
70
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
A
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
A
45
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
45
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
A
滴个龟龟 — 爬宠数字身份登记与溯源平台
api.digeguigui.com
六部位拍照上户口 · Git哈希不可篡改 · 一龟一证终身可查。人工繁育商家入驻，卖龟自带身份证。
OpenAPI
API
MCP
data
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
A
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
A
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
A
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
A
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
VaultCrux: read the whole system, or ask it a question
api.vaultcrux.com
The documentation is the argument. Read it front to back, discover the subsystems behind it, follow a trail to one outcome, or ask the corpus directly and get cited passages back.
llms.txt
API
AI bots
data
45
+25 llms.txt
+15 structured API
missing +20 ai-plugin
API de Consulta de CPF | CPFHub.io
cpfhub.io
API de consulta de CPF com dados verificados, 99,9% de uptime e conformidade LGPD. Integre em minutos. 50 consultas grátis. Sem cartão de crédito.
llms.txt
OpenAPI
AI bots
Schema.org
security
55
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
Datacircle | All GTM APIs
datacircle.dev
Every GTM API we find, one row for each plan of each call: what it costs per 1,000, what it charges when it finds nothing, its rate limits, its speed and the fields it returns.
llms.txt
API
Schema.org
MCP
security
55
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Douyin, RedNote, Weibo & TikTok data API | Qovia
qovia.ai
One API key for 100+ endpoints across 20+ platforms (Douyin, Xiaohongshu (RedNote), TikTok, WeChat, Taobao and JD reviews and more) and one search across 10 kinds of public sources. Only successful requests are billed; empty results and failures are not charged.
llms.txt
API
Schema.org
MCP
ai-tools
55
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Twelve Data | Stock, Forex, and Crypto Market Data APIs
twelvedata.com
Try Twelve Data financial APIs for free with instant access to stock, forex, cryptocurrency, and fundamental market data. Real time, historical, and EOD data.
llms.txt
API
Schema.org
MCP
finance
55
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Wire NHS into your agent — MCP server
Add Not Human Search as an MCP tool. Your agent can call search_agents, get_site_details, get_stats, and submit_site at runtime.
Claude Code
claude mcp add --transport http nothumansearch https://nothumansearch.ai/mcp
Other clients: point any MCP-compatible tool at
https://nothumansearch.ai/mcp (streamable-http transport).Use NHS via REST
Prefer plain HTTP? Hit the search endpoint directly.
Search API
curl "https://nothumansearch.ai/api/v1/search?q=payment+API"
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