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paid-api-access

1–24 of 1,249

Exa

api.exa.ai

76
score

Neural web search and page-content retrieval for AI agents, paid per request with no API key.

USDUSDC BaseSolanaTempo

cheaptokens.ai

cheaptokens.ai

76
score

OpenAI-compatible LLM inference and chat completions via discounted Venice API credits. Pay USDC to receive a live Venice.ai API key for /api/v1 models, chat, images, audio, video, and embeddings. Same-Day credits are 30–90% below Venice direct and expire at 23:59 UTC; Prepaid API Keys support recurring agent jobs.

USDC Base

dripstack.xyz

dripstack.xyz

72
score

Paid JSON for stock-picker calls from financial newsletters and investing articles. Query params: optional `date=YYYY-MM-DD` for one UTC effective day, optional `limit`. Default (omit `date`) returns the latest UTC effective day with picks. Rows missing publication timestamps may use extractedAt for the effective day. Returns 404 when no picks exist for the day. USDC `exact` x402 on Base or Solana; amount is based on distinct attributed source posts returned.

USDC BaseSolana

dripstack.com

dripstack.com

72
score

Paid JSON for stock-picker calls from financial newsletters and investing articles. Query params: optional `date=YYYY-MM-DD` for one UTC effective day, optional `period=latest` (same as default), optional `limit`. Default returns the latest UTC effective day with picks. Rows missing publication timestamps may use extractedAt for the effective day. Returns 404 when no picks exist for the day. The x402 amount is based on distinct attributed source posts returned.

USDC Base

x402.twit.sh/communities/members

x402.twit.sh

69
score

Get a paginated list of members belonging to a specific X Community. Returns full user profiles with community role (Admin, Moderator, Member). This endpoint has no equivalent in the official X API. Query params: id (string, required) - numeric community ID; next_token (string, optional) - pagination cursor, e.g. GET /communities/members?id=1693573582226665701. Returns X v2 API-compatible JSON.

BTCUSDC BaseLightning

x402-key.558686.xyz

x402-key.558686.xyz

68
score

Verify the OpenAI-compatible base URL, model list contract, request shape, secret boundary, and next key-pack route before buying a URL + API key quota pack.

USDC Base

chat.gedx402.com

chat.gedx402.com

67
score

Voice-agent reply turn — low-latency chat after WebSocket ASR flux and smart-turn detection. POST messages[]; synthesize with POST /v1/tts/aura-2-en. Bundle: GET /v1/models?bundle=voice.

USDC ArbitrumBaseOther EVMPolygonSolana

x402.aubr.ai

x402.aubr.ai

65
score

Send a question about longevity, aging, or lifespan science. Returns a request ID to poll for the AI-generated answer from Aubrai, VitaDAO's decentralized co-scientist.

USDC Base

aubrai-x402.vercel.app

aubrai-x402.vercel.app

65
score

Send a question about longevity, aging, or lifespan science. Returns a request ID to poll for the AI-generated answer from Aubrai, VitaDAO's decentralized co-scientist.

USDC Base

x402-api.aubr.ai

x402-api.aubr.ai

65
score

Send a question about longevity, aging, or lifespan science. Returns a request ID to poll for the AI-generated answer from Aubrai, VitaDAO's decentralized co-scientist.

USDC Base

charts.wdh.sh

charts.wdh.sh

65
score

A Chart.js-compatible charting endpoint: POST a standard Chart.js config — the same `{ type, data, options }` you'd hand to `new Chart()` — and get back a rendered PNG. Backed by chartsplat.com, it renders every chart type chartsplat supports: bar, line, pie, doughnut, radar, polar area, and OHLC/candlestick (financial) charts, with the full set of Chart.js options (labels, multiple datasets, colors, titles, legends, scales). Made for embedding charts as images in agent reports, dashboards, Discord/Slack messages, and trading screenshots — anywhere you need a static image, not an interactive widget.

USDC Base

api.chartsplat.com

api.chartsplat.com

65
score

A Chart.js-compatible charting API: POST a standard Chart.js `{ type, data, options }` — the same object you would hand to `new Chart()` — and get back a rendered PNG. Supports bar, line, pie, doughnut, radar, polar area, and candlestick/OHLC charts with the full set of Chart.js options. Pay per chart with x402 (USDC on Base) or use a Chart Splat API key — ideal for charts in agent reports, dashboards, and chat messages.

USDC Base

netintel.dev

netintel.dev

65
score

OpenAI-compatible chat completions gateway (alias of /v1/chat/completions for api/v1-style base URLs) — standard request shape, model chosen in the body (gpt-4o, gpt-4.1, minis, nanos). Flat $0.10 per call in USDC via x402, no API key. Free model catalog: GET /v1/models.

USDC BaseSolana

api.moltalyzer.xyz/api/moltbook/digests

api.moltalyzer.xyz

64
score

Historical hourly AI intelligence digests (1-24 hours lookback). Track how AI agent sentiment, topics, and narratives evolve over time. Each digest contains full analysis of that hour's agent activity.

BTCUSDC BaseLightning

api.metalend.tech

api.metalend.tech

64
score

Returns MetaLend API services directory with a one-line summary of each RebalancerResource endpoint plus links to API docs.

USDC Base

gdpr-scanner.api.klymax402.com

gdpr-scanner.api.klymax402.com

64
score

Scan a website for GDPR compliance — cookie consent, privacy policy, trackers (POST variant)

USDC Base

vibesprings.net

vibesprings.net

64
score

AEO/GEO Agent Visibility Auditor. Audit any third-party API endpoint for x402 compatibility, schema compliance, robots.txt indexing accessibility, and LLM tool calling clarity.

USDC Base

2s.io

2s.io

64
score

Find the right 2s endpoint for a task using natural language. Pass q (e.g. 'check if a domain can be spoofed', 'is this CVE being exploited', 'screen a company for sanctions', 'decode a VIN') and get back the catalog's most relevant endpoints, ranked, each with its id, API path, method, group, description, and price. Deterministic keyword + synonym matching over the live endpoint registry (no LLM, no external calls) — a self-routing index so an agent (or its planner) can discover which paid call answers a question instead of reading the whole 290+ endpoint catalog. Returns the path you then call directly.

USDC BaseSolana

netintel.dev

netintel.dev

63
score

OpenAI-compatible text embeddings API (alias of /v1/embeddings for api/v1-style base URLs) — input as a string or batch of up to 128 strings, model text-embedding-3-small (default) or text-embedding-3-large. Flat $0.005 per call in USDC via x402, no OpenAI account or API key.

USDC BaseSolana

netintel-production-440c.up.railway.app

netintel-production-440c.up.railway.app

63
score

Fetch public metadata for any GitHub repository — stars, forks, open issues, language breakdown, license, contributors, last commit date, topics, and an activity/health score — so agents can evaluate dependencies, research projects, and assess open source health without the GitHub API complexity. Pass repo as ?repo=owner/repo (GET) or {"repo":"owner/repo"} (POST).

USDC Base

netintel.dev

netintel.dev

63
score

Fetch public metadata for any GitHub repository — stars, forks, open issues, language breakdown, license, contributors, last commit date, topics, and an activity/health score — so agents can evaluate dependencies, research projects, and assess open source health without the GitHub API complexity. Pass repo as ?repo=owner/repo (GET) or {"repo":"owner/repo"} (POST).

USDC Base

2s.io

2s.io

63
score

Unified read API over US National Park Service developer.nps.gov. Pick a resource: parks (every NPS unit — historical parks, monuments, seashores, etc.), alerts (closures, dangers, info), campgrounds (NPS-operated campgrounds with reservation links), events (talks, walks, ranger programs), newsreleases (park news), thingstodo (activities by park), visitorcenters. Filter by parkCode (CSV — e.g. "acad,yose,grca"), state, or free-text query. Returns the upstream NPS payload verbatim (rich nested objects with images, addresses, operating hours, etc.).

USDC BaseSolana

2s.io

2s.io

63
score

English dictionary lookup via dictionaryapi.dev (Wiktionary-sourced). Returns full entries with IPA phonetic transcription(s), audio pronunciation URLs, and meanings grouped by part of speech. Each meaning carries definitions with usage examples and per-definition synonyms + antonyms. CC BY-SA 3.0/4.0 — attribute when redistributing. Useful for vocabulary agents, writing assistants, language-learning tools.

USDC BaseSolana

domain-intelligence.api.klymax402.com

domain-intelligence.api.klymax402.com

63
score

Get comprehensive domain intelligence (WHOIS + DNS + SSL) (POST variant)

USDC Base