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OpenAPI Spec Directory

Every API in our index that publishes an OpenAPI/Swagger spec — ranked by agentic readiness.

5725
Sites Indexed
39
Avg Score
977 entries in this directory
HumanMirror — Control plane for autonomous agents
humanmirror.fr
HumanMirror est le control plane des agents autonomes : décision avant action, preuve après exécution, routage machine et gouvernance de flotte.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP other
100
+25 llms.txt +20 ai-plugin
Hand AI work to clients with receipts | Zambo
zambo.dev
Zambo gives your AI hands, memory, and proof. The verifiable work layer for AI: 153 tools, cross-AI continuity, and verifiable receipts from one URL. No key.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP developer
100
+25 llms.txt +20 ai-plugin
Shipstar — Automated Marketing for Developers
shipstar.ai
Ship features, and Shipstar handles the marketing. Changelogs, release notes, social posts, and more — all automated from your workflow.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP ai-tools
100
+25 llms.txt +20 ai-plugin
Dexi — Research, streamlined: notes, bookmarks & feeds
dexi.net
Dexi is a personal knowledge management app: notes, bookmarks, newsletters and RSS in one searchable workspace, free to start. Official site: dexi.net.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP other
100
+25 llms.txt +20 ai-plugin
CompliAPI — Real-Time Sanctions Screening API
compliapi.com
Screen crypto addresses, emails, websites, government IDs and countries against OFAC and 10+ global lists in real time, plus geo-fencing and VPN detection — one API key, one GET request.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP finance
100
+25 llms.txt +20 ai-plugin
Hermès Birkin Bags — Buy Authenticated New & Pre-Owned | Find Your Birkin
birkinbagstock.com
Find authenticated Hermès Birkin bags from 121 trusted luxury resellers. 5865 bags currently available. AI-powered search.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP ai-tools
100
+25 llms.txt +20 ai-plugin
AISkills402 — skills your agent can pay for
aiskills402.com
Tested SKILL.md files that AI agents buy once over x402, paid in USDC on Base. Yours forever, with free re-downloads and new versions.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP ai-tools
100
+25 llms.txt +20 ai-plugin
Paid listings for AI agents | 402post
402post.com
Paid listings for AI agents: post over HTTP or MCP, pay with x402 in USDC, and read the same listings as web pages, Markdown, JSON and RSS.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP ai-tools
100
+25 llms.txt +20 ai-plugin
402cron — scheduled webhooks for AI agents, paid per run
402cron.com
Signed, verified webhook delivery on a cron schedule. From $0.0005 per run, paid in USDC on Base via x402. No account, no card, no human.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP ai-tools
100
+25 llms.txt +20 ai-plugin
402registry — does an AI agent actually see your site?
402registry.com
Pay-per-check discoverability audit: $0.01 to see what an AI crawler actually sees on your site — GPTBot, ClaudeBot, PerplexityBot, OAI-SearchBot, not a browser render. A passing check earns a dated badge and a registry listing. No account, no card, no human.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP ai-tools
100
+25 llms.txt +20 ai-plugin
検閲なし AI チャット｜拒否しない・制限なしで答える｜Deepent Research
deepentresearch.com
検閲なし（uncensored）AI チャット。abliterated モデルを使い、一般の AI が拒否する研究・教育の問いにも答えます。GPU 不要、無料プランあり。
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP ai-tools
100
+25 llms.txt +20 ai-plugin
Creative Cult: what players think of new games
creativecult.digital
Player reviews of every notable new game, read in full and tracked daily, with a release calendar and monthly best-of lists ranked by players.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP productivity
100
+25 llms.txt +20 ai-plugin
CurlShot - Take a screenshot of any website, online or by API
curlshot.com
Paste a website address and get a screenshot of the whole page as an image or PDF. Free to try, nothing to install. For developers, one simple screenshot API.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP productivity
100
+25 llms.txt +20 ai-plugin
BlazePhoenix — On-chain DEX Aggregator: the quote and the execution are one computation
blazephoenix.xyz
BlazePhoenix ($BZPX): fully on-chain DEX aggregator on 5 chains. Quotes measured at 0–1 bps of delivery; 2.4–10.9× less gas per leg. Compute, do not trust.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP ecommerce
100
+25 llms.txt +20 ai-plugin
S
the future begins here
smithtalks.pages.dev
A pseudonymous JSON message network for autonomous agents. Claims, a task board, a marketplace, sealed public records. No signup, no fee, no browser.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP developer
100
+25 llms.txt +20 ai-plugin
AbuzzHive
abuzzhive.com
Where AI agents help each other: agents post problems they are stuck on, other agents solve them. Open to every agent via MCP, OAuth and OpenAPI.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP ai-tools
100
+25 llms.txt +20 ai-plugin
L
Loki66 Agent Beacon
loki66-agent-beacon.onrender.com
Public rendezvous node for agents seeking coordination with Loki66.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP other
100
+25 llms.txt +20 ai-plugin
M
objekts Production Desk · Install & Test
mcp.objekts.ai
objekts Production Desk by objekts — production planning, feasibility and directional estimates for commercial visual production.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP developer
100
+25 llms.txt +20 ai-plugin
ChainRay - On-chain intelligence for AI agents
chainray.online
Blockchain data and intelligence service for AI agents. 93 paid capabilities / 94 HTTP route templates across 57 supported networks, from gas fees to DeFi analytics, with real-time streams, intent routing, and verifiable proofs. Pay-per-request via x402.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP ai-tools
100
+25 llms.txt +20 ai-plugin
Crypto Payment Gateway, non-custodial, $0 fees · Shieldz
shieldz.cash
Non-custodial crypto payment gateway and API. Accept USDC, USDT, Bitcoin and Zcash straight to your own wallet, $0 platform fees, no KYC to start.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP finance
100
+25 llms.txt +20 ai-plugin
A
Agent Guild — trust and payment safety for autonomous agents
agent-guild-5d5r.onrender.com
Verify autonomous-agent endpoints, rank counterparties by evidence-backed reputation, and get an allow, caution or block decision before delegation or payment. Free live preflight; REST, MCP and A2A.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP ecommerce
100
+25 llms.txt +20 ai-plugin
eqbuilder.dev — The EQ Benchmark for AI Agents
eqbuilder.dev
Run the pay-and-score guide at https://eqbuilder.dev/api/starter-kit/PAY_AND_SCORE.md?source=one-step-x402. Its client posts your score request, reads the live canonical x402 v2 quote, signs the Base USDC EIP-3009 requirement, retries once with PAYMENT-SIGNATURE, and returns the result with PAYMENT-RESPONSE. No account, API key, or ETH is required. A controlled live test confirmed one settlement and delivery; it is not customer adoption.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP ai-tools
100
+25 llms.txt +20 ai-plugin
MACH Base — machine-native Base data
api.mach.gallery
MACH Base — fast, low-cost Base data for autonomous agents. Pay per call with USDC over x402.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP data
100
+25 llms.txt +20 ai-plugin
TerminalFeed: Free Real-Time Dashboard for Crypto, Stocks, News & More
terminalfeed.io
Live Bitcoin ticker with real-time BTC price updates, plus 30+ free data feeds: stocks, crypto, Fear & Greed, prediction markets, earthquakes, space launches. The free Bloomberg Terminal alternative for your second monitor. No login required.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP finance
100
+25 llms.txt +20 ai-plugin
Chart Library — what happened after stocks like this
chartlibrary.io
Look up a stock. We show similar moments in market history and the range of what followed — not a prediction. An idea sheet of live situations, scored in public. Not a buy list.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP finance
100
+25 llms.txt +20 ai-plugin
PreReason - Market Context API
prereason.com
PreReason delivers market context for financial agents. Bitcoin on-chain metrics, macro indicators, and reasoning context in one API call.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP finance
100
+25 llms.txt +20 ai-plugin
Twitter/X API for Public Data — Pay Per Result | SocialData
socialdata.tools
Read public Twitter/X data — tweets, profiles, followers, search — through a simple REST API. No developer account, no subscription. $0.20 per 1,000 results.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP finance
100
+25 llms.txt +20 ai-plugin
Dynamic Feed | Infrastructure for trustworthy machine decisions
dynamicfeed.ai
Dynamic Feed provides live, source-attributed information with verifiable receipts, helping AI agents, robots and enterprise systems make better decisions using trustworthy, current evidence.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP developer
100
+25 llms.txt +20 ai-plugin
D
Dominion Observatory — Behavioral trust for MCP servers (runtime, not static scans)
dominion-observatory.sgdata.workers.dev
Most MCP trust tools statically scan the code. Dominion Observatory is the neutral, third-party layer that measures what an MCP server actually does at runtime — uptime, success rate, latency from real agent traffic — and shows 'unrated' instead of a fake score when there's no data. Look up any server free.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP developer
100
+25 llms.txt +20 ai-plugin
deadends.dev - Stop Trying What Doesn't Work
deadends.dev
Stop wasting time on dead-end fixes. See what NOT to try, what works, and what error comes next. 2725 error entries across 54 domains.
llms.txt ai-plugin OpenAPI API AI bots Schema.org MCP developer
100
+25 llms.txt +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"
Agent Docs
llms.txt OpenAPI spec ai-plugin.json

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