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

SmartPerps by AgentGateSocial & people
Smart-money positioning for one Hyperliquid perp: how the 120 most profitable Hyperliquid accounts (30-day PnL, public leaderboard, rules-based) are positioned right now: traders long vs short, long/short/net notional in USD, bias (strong long / lean long / mixed / lean short / strong short), 1h and 24h net notional flow, snapshot age, cohort coverage. Fail-closed: stale or low-coverage snapshots
Basesmartperps.agentgate.workers.dev
from $0.003
1 endpoint
0
calls / 30d
SmartMoneyMarkets & finance
Composite smart-money signal (insiders + Congress + institutions + analysts) for a stock (?ticker=)
Basesmartmoney.lonestaroracle.xyz
from $0.10
1 endpoint
0
calls / 30d
C
Contract Risk APISocial & people
Combined pre-trade safety check: on-chain risk score (proxy + privileged-function detection from live bytecode) plus Telegram alert-channel monitoring, in one call. Cheaper than calling /v1/scan and /v1/alert-check separately ($0.04 vs $0.05), and the two signals are worth more together — a contract with privileged functions that is also being flagged in a security channel is a different situation
Basesmartcontractrisk.0xhodhod.xyz
from $0.02
3 endpoints
0
calls / 30d
S
slinging-chloride-chair.ngrok-free.devAI & agents
AI infra claim verification — pay-per-query.
Baseslinging-chloride-chair.ngrok-free.dev
from $1.00
1 endpoint
0
calls / 30d
S
slamlink-ai-main-50fbb45.d2.zuplo.devAI & agents
No description yet.
Baseslamlink-ai-main-50fbb45.d2.zuplo.dev
from $0.0062
1 endpoint
0
calls / 30d
S
skynetzero-researchSearch & web
Short cited research answer for a query
Baseskynetzero-research.skynetzero-research.workers.dev
from $0.10
1 endpoint
0
calls / 30d
Skavio USDC VerificationCrypto & DeFi
Read-only native Circle USDC transfers across six EVM chains and Solana.
Baseskavio.eu
from $0.02
1 endpoint
0
calls / 30d
L
link-rel-pingbackSocial & people
Change watch for does site use owl carousel: runs the check, compares it with the result from your previous call for the same domain (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.
Basesite.intel.rallylive.ca
from $0.01
48 endpoints
0
calls / 30d
Singularity ServersDeveloper tools
Singularity Servers: provision a persistent Linux VPS
Basesingularityservers.com
from $0.09
1 endpoint
0
calls / 30d
G
gradeDeveloper tools
Slug generator: url-safe slug from unicode text, latin and Cyrillic transliteration
Basesigtap-outreach-api.sigtap.workers.dev
from $0.0005
12 endpoints
0
calls / 30d
SignCheck by AgentGateCrypto & DeFi
Offline pre-sign check (no RPC, fast): decodes a transaction, EIP-712 typed data (Permit, Permit2, EIP-3009), an EIP-7702 authorization or an x402 402 + payment payload and returns SAFE/CAUTION/DANGER, every risk flag with its reason, decoded args, counterparties, x402 payment-vs-402 match and OFAC SDN screening. Use /v1/check for on-chain facts and simulation.
Basesigncheck.agentgate.workers.dev
from $0.005
1 endpoint
0
calls / 30d
Signal Feed APICrypto & DeFi
Daily market-regime context for trading agents: is the market risk-on or risk-off? One call returns today's issue: BTC trend filter (SMA20/50), trend scores for 9 altcoins, US equity regime (SPY vs SMA200, VIX term structure), SPY RSI(2) state and an MSTR BTC filter. Use it once a day before an agent sizes or gates trades. Rule-based, from PAPER research accounts, no track record, not advice. Issu
Basesignals.agenttrustapi.com
from $0.10
1 endpoint
0
calls / 30d
S
shopify-spyCrypto & DeFi
AgentDiet Semantic Distillation (/v1/distill) — Strips 85-97% of HTML token bloat
Baseshopify-spy.agentdiet.dev
from Free
5 endpoints
0
calls / 30d
S
shopify-spyCrypto & 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.
Baseshopify-spy-72343955726.us-central1.run.app
from Free
5 endpoints
0
calls / 30d
S
shopify-intelCrypto & DeFi
AgentDiet Semantic Distillation (/v1/distill) — Strips 85-97% of HTML token bloat
Baseshopify-intel.agentdiet.dev
from Free
5 endpoints
0
calls / 30d
S
shopify-intelCrypto & 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.
Baseshopify-intel-72343955726.us-central1.run.app
from Free
5 endpoints
0
calls / 30d
S
shop.northheart.appCrypto & DeFi
Busiest x402 services in our directory sample, of one kind (our own keyword grouping) under your price limit, with at least 2 calls per buyer: ?kind=&max_price_usd=&min_payers= (kinds: AI answers and writing, Blockchain data lookups, Web search and page reading, Prices and market data, Other)
Baseshop.northheart.app
from $0.005
14 endpoints
0
calls / 30d
shop.blocklabs.nlCrypto & DeFi
Place a dropshipping order (price quoted per order). Ships to EU member states only. Payer wallet must be deployed (counterfactual smart accounts are not supported).
BaseSolanashop.blocklabs.nl
from $0.001
5 endpoints
0
calls / 30d
S
shitx402.wtfOther services
No description yet.
Baseshitx402.wtf
from $1.00
1 endpoint
0
calls / 30d
F
FreelanceShieldOther services
Notarize freelance deliverable. Returns signed PDR.
Baseshield.aotrust.link
from $0.10
1 endpoint
0
calls / 30d
C
CSV Quality ReportData & research
Deterministic CSV quality report: missing cells, duplicate rows and column checks; up to 64 KiB and 1,000 records including header.
Basesha256eunicehash.com
from $0.10
1 endpoint
0
calls / 30d
S
server.r1xlabs.comOther services
No description yet.
Baseserver.r1xlabs.com
from $0.01
4 endpoints
0
calls / 30d
S
serp-realtime-web-groundingSearch & web
SERP-Extract Real-Time Search & Citation Grounding Node: Extracts live web search rankings, snippets, and grounding citations for autonomous agents.
Baseserp.agentdiet.dev
from Free
1 endpoint
0
calls / 30d
S
serp-extractCrypto & DeFi
AgentDiet Semantic Distillation (/v1/distill) — Strips 85-97% of HTML token bloat
Baseserp-extract.agentdiet.dev
from Free
5 endpoints
0
calls / 30d
S
serp-extractCrypto & 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.
Baseserp-extract-72343955726.us-central1.run.app
from Free
5 endpoints
0
calls / 30d
T
Token Security & Verdict x402Crypto & DeFi
Token security verdict for an ERC-20 on Base or Ethereum: risk score (0-100), flags, liquidity, holder concentration, honeypot indicators, top holders and a short summary.
Baseseo-mcp-x402.abacusai.app
from $0.02
1 endpoint
0
calls / 30d
S
sentinel-agent.devAI & agents
No description yet.
Basesentinel-agent.dev
from $0.005
1 endpoint
0
calls / 30d
S
sentinel-agent-wru6.onrender.comAI & agents
No description yet.
Basesentinel-agent-wru6.onrender.com
from $0.005
1 endpoint
0
calls / 30d
S
semilla1-txcheck.semilla1lab.deno.netOther services
Resumen de una transacción de Base: estado, gas, transferencias USDC
Basesemilla1-txcheck.semilla1lab.deno.net
from $0.01
1 endpoint
0
calls / 30d
S
semagram.ioSocial & people
Profile details and latest posts of named Telegram channels, groups, and bots, read live
BaseSolanasemagram.io
from $0.01
2 endpoints
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.