Explore APIs

Every pay-per-call x402 API we can find, ranked by what agents actually pay for. No accounts, no API keys.

Projects: 4.5K
Paid endpoints: 106K
Paid calls · 30 days: 1M
Launched here: 0

All projects

4,273 results

Most used Rising Most payers Newest Cheapest A–Z

P
pulse.scrapemole.workers.devMarkets & finance
Use when you need a current, citable exchange rate: returns the latest European Central Bank reference rates (published once per working day around 16:00 CET) for about 30 major currencies, re-based to any supported currency, optionally filtered to the symbols you need. Includes the rate date so you know how fresh it is. Not for trading; for pricing, reporting, invoicing and conversions.
Basepulse.scrapemole.workers.dev
from $0.001
17 endpoints
0
calls / 30d
P
pssvoirdgqkejvuqvaxw.supabase.coImages, audio & video
AI meeting notetaker comparison dataset: 13 commercial tools plus Microsoft Teams, Google Meet and Notion, compared on pricing (incl. hidden costs), Dutch/French support, speaker identification, export data quality, security certifications and EU/GDPR posture. Independent research by Machinegeist; no vendor affiliations, no commissions.
Basepssvoirdgqkejvuqvaxw.supabase.co
from $0.005
1 endpoint
0
calls / 30d
PrysmSearch & web
Search the web with AI-oriented result extraction.
Baseprysm-kappa.vercel.app
from $0.10
1 endpoint
0
calls / 30d
P
proxy.x402scan.comOther services
No description yet.
Baseproxy.x402scan.com
from $0.01
6 endpoints
0
calls / 30d
P
proofwork-the402-webhook.phase-voice.workers.devImages, audio & video
Verify an exact Circle USDC payment from a Base-mainnet transaction receipt and finalized chain evidence
Baseproofwork-the402-webhook.phase-voice.workers.dev
from $0.001
3 endpoints
0
calls / 30d
P
prompt-guardCrypto & DeFi
AgentDiet Semantic Distillation (/v1/distill) — Strips 85-97% of HTML token bloat
Baseprompt-guard.agentdiet.dev
from Free
5 endpoints
0
calls / 30d
P
prompt-guardCrypto & DeFi
Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router (/v1/x402-broker) — Single-connection meta-router indexing 500+ MCP servers & A2A tools with 85% token compression and Prompt-Guard firewall.
Baseprompt-guard-72343955726.us-central1.run.app
from Free
5 endpoints
0
calls / 30d
P
project-zero-agent-api.jordy-prods.workers.devAI & agents
Preflight untrusted text for common prompt-injection, credential-exfiltration, and tool-abuse patterns. Deterministic heuristic scan; not a guarantee of safety.
Baseproject-zero-agent-api.jordy-prods.workers.dev
from $0.002
1 endpoint
0
calls / 30d
A
Atlas Probability IntelligenceMarkets & finance
Atlas Bitcoin/BTC 60-minute (1-hour) probabilistic market forecast
Baseprob.atlasprobabilityapi.com
from $0.005
2 endpoints
0
calls / 30d
P
Prime-Agent x402 IntelligenceAI & agents
Canonical-at-read-time Base mainnet block status with block hash provenance.
Baseprime-agent-x402-intelligence.onrender.com
from $0.001
1 endpoint
0
calls / 30d
P
pricing-state-api.replit.appCrypto & DeFi
$0.01 USDC required (x402 / Base) Returns the history of detected pricing changes: what changed, plan-level detail, and when each change was detected. No API key needed. Pay with any x402-compatible wallet that holds USDC on Base. If your agent does not yet have a funded wallet, set one up via Coinbase Agentic Wallet or Base MCP — then standard x402 clients will pay and retry automatically.
BaseSolanapricing-state-api.replit.app
from $0.01
72 endpoints
0
calls / 30d
P
PriceCheckOther services
Extract the current price, original price, currency, discount and availability from a public ecommerce, product or software pricing page.
Basepricecheck-mainnet-production.up.railway.app
from $0.01
1 endpoint
0
calls / 30d
Q
Quick Brief APISearch & web
Use this when you need a fast cited answer, not deep research: one live web search, relevance-ranked sources, snippet-level digest with 3-6 cited key points in seconds. No API key, no signup — x402 per-call payment only. For full-page depth use the $0.05 Research Brief on the same origin.
Basepreview-chat-985505b1-9dc0-470f-9fc3-3704d8b625e3.space-z.ai
from $0.01
2 endpoints
0
calls / 30d
P
premises.regevidencehub.comData & research
Paid premises-licence preflight. Evidence-first deterministic UK premises-licence decision with official-source freshness guards. Payment verification precedes business execution. Not licensing-authority approval or legal advice.
Basepremises.regevidencehub.com
from $0.03
1 endpoint
0
calls / 30d
M
Machine Preflight APICrypto & DeFi
Simulate and inspect an unsigned Base transaction for approvals, privileged selectors, reverts and target-code anomalies.
Basepreflight.natio.re
from $0.02
1 endpoint
0
calls / 30d
P
preflightAI & agents
A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor (/v1/x402-audit) — Audits any remote agent or MCP URL for JSON-RPC compliance, latency SLA, OpenAPI schema, and HTTP 402 settlement headers. (https://preflight.agentdiet.dev/v1/preflight/certify)
Basepreflight.agentdiet.dev
from Free
1 endpoint
0
calls / 30d
P
prediction-markets-production-3e07.up.railway.appOther services
No description yet.
Baseprediction-markets-production-3e07.up.railway.app
from $0.005
1 endpoint
0
calls / 30d
P
pplx.x402.paysponge.comOther services
No description yet.
Basepplx.x402.paysponge.com
from $0.01
1 endpoint
0
calls / 30d
P
postyourprice.comAI & agents
Prepaid inference credits for the unmodified Conway automaton runtime: SIWE provisioning, USDC topups on Base, inference billed at purchase cost plus a fixed markup
Basepostyourprice.com
from $5.00
1 endpoint
0
calls / 30d
PortfolioRiskOther services
Portfolio risk analysis — concentration volatility correlation across holdings
Baseportfolio.lonestaroracle.xyz
from $0.10
1 endpoint
0
calls / 30d
Linkrra VoiceImages, audio & video
Linkrra Voice — text-to-speech with WAV output and automatic Hebrew nikud. Pay per call in USDC on any network offered in the payment challenge; no account or API key. From $0.01 per call.
Basepool.linkrra.com
from $0.001
9 endpoints
0
calls / 30d
P
pons.meshgateway.coOther services
No description yet.
BaseRobinhood ChainEVM chain 5042pons.meshgateway.co
from $0.03
1 endpoint
0
calls / 30d
P
pong-pay-production.up.railway.appOther services
No description yet.
Basepong-pay-production.up.railway.app
from $0.001
2 endpoints
0
calls / 30d
P
polymarket-oddsCrypto & DeFi
AgentDiet Semantic Distillation (/v1/distill) — Strips 85-97% of HTML token bloat
Basepolymarket-odds.agentdiet.dev
from Free
5 endpoints
0
calls / 30d
P
polymarket-oddsCrypto & DeFi
Universal A2A & MCP Tool Discovery, Safe-Proxy & Swarm Router (/v1/x402-broker) — Single-connection meta-router indexing 500+ MCP servers & A2A tools with 85% token compression and Prompt-Guard firewall.
Basepolymarket-odds-72343955726.us-central1.run.app
from Free
5 endpoints
0
calls / 30d
WalletPnLCrypto & DeFi
Wallet realized and unrealized PnL — per-token profit and loss and cost basis for any EVM address
Basepnl.lonestaroracle.xyz
from $0.20
1 endpoint
0
calls / 30d
P
pm-rules-x402.linholiday.workers.devCrypto & DeFi
Structured Polymarket resolution rules for one market: full rules_text, key clauses, end time in UTC and America/New_York, resolution source, UMA/Chainlink oracle hints, umaBond, outcomes, status. Title ≠ rules. No CLOB book or live odds.
Basepm-rules-x402.linholiday.workers.dev
from $0.01
1 endpoint
0
calls / 30d
P
playground.llliiiii.workers.devOther services
No description yet.
Baseplayground.llliiiii.workers.dev
from $0.001
1 endpoint
0
calls / 30d
P
pkgs.scrapemole.workers.devSearch & web
Use when you need the public npm registry card for a package (scoped or unscoped): returns description, homepage, bugs URL, repository, license, keywords, maintainers as names only (emails stripped), number of versions, latest dist-tag version, created/modified times, and last-week download count from the official downloads API. Private packages are not supported.
Basepkgs.scrapemole.workers.dev
from $0.002
6 endpoints
0
calls / 30d
P
piprail.comOther services
PipRail live x402 demo: pay $0.01 USDC on Base to unlock.
Basepiprail.com
from $0.01
1 endpoint
0
calls / 30d

Service data comes from the Coinbase CDP and PayAI discovery lists and refreshes every few hours. Usage is paid calls over the last 30 days. APIs launched here are verified by us; the rest are paid directly to their owners.