CoinCap API alternatives
12 MCP servers, A2A agents and x402 APIs that also do on-chain data, x402 paid apis, trading & markets, ranked by how much they overlap with CoinCap API (x402 paid API), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| CoinCap API (this one) | x402 paid API | Yes | 11 | 90/100 |
| Arkham x402 | x402 paid API | Yes | 5 | 90/100 |
| OneSource | x402 paid API | Yes | 12 | 90/100 |
| Otto AI x402 | x402 paid API | Yes | 12 | 90/100 |
| ApiToll Crypto & DeFi market data | x402 paid API | Yes | 11 | 89/100 |
| AgentBIT API | x402 paid API | Yes | 12 | 90/100 |
| Apex Forge Commerce Node | A2A agent | Yes | 11 | 90/100 |
| Bounty Engineer Autonomous Mission Commerce | A2A agent | Yes | 24 | 90/100 |
| Coin Railz | A2A agent | Yes | 24 | 90/100 |
| Ops Control HQ Utility Agent | A2A agent | Yes | 20 | 90/100 |
| Pocket Network Agentic Portal | x402 paid API | Yes | 12 | 90/100 |
| x402node | x402 paid API | Yes | 12 | 90/100 |
| Liquid Agent: Money Tools for AI Agents | A2A agent | Yes | 11 | 60/100 |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- Arkham x402 Live x402
Pay-per-request Arkham wallet intelligence and market data API protected by x402.
x402 paid API · 5 endpoints · check 90/100 · also does on-chain data, x402 paid apis, trading & markets
- OneSource Live x402
OneSource - three data families for AI agents on one host: Ethereum mainnet, Sepolia testnet, and Robinhood Chain RPC (served from OneSource-operated nodes), plus Deepstate on-chain market data (order books, trades, can…
x402 paid API · 12 endpoints · check 90/100 · also does on-chain data, x402 paid apis, trading & markets
- Otto AI x402 Live x402
Otto AI runs a swarm of autonomous agents exposing 84 pay-per-call services on x402 V2 across eight capability tags — Market & Token Intelligence, DeFi & Markets Data, Web & Domain Intelligence, Real-World Data, AI Crea…
x402 paid API · 12 endpoints · check 90/100 · also does on-chain data, x402 paid apis, trading & markets
- ApiToll Crypto & DeFi market data Live x402
ApiToll runs pay-per-call data agents on x402 (USDC on Base + Solana). This service returns real-time crypto + DeFi market data — token prices, DeFi yields, TVL, stablecoin supply, and DEX volume — paid per call, no sub…
x402 paid API · 11 endpoints · check 89/100 · also does on-chain data, x402 paid apis, trading & markets
- AgentBIT API Live x402
Autonomous API & AI agent tools, monetized per call via the x402 payment protocol.
x402 paid API · 12 endpoints · check 90/100 · also does on-chain data, x402 paid apis, trading & markets
- Apex Forge Commerce Node Live A2A
x402-paid machine services on Base + Solana USDC: security audit verdicts, token/contract heuristic risk screens, release preflight, corpus search, routed LLM inference, live perp market data (funding/basis), lane healt…
A2A agent · NONSYNTHETIC · 11 skills · check 90/100 · also does on-chain data, x402 paid apis, trading & markets
- Bounty Engineer Autonomous Mission Commerce Live A2A
Machine-buyable infrastructure for autonomous agents: premium multi-agent Mission Control, subcontractor mesh compilation, mission digital twins, failure-cost firewall and run forensics, plus provider routing, spend con…
A2A agent · Bounty Engineer · 24 skills · check 90/100 · also does on-chain data, x402 paid apis, trading & markets
- Coin Railz Live A2A
Multi-chain x402 micropayment infrastructure for AI agents with 80 pay-per-call services.
A2A agent · Coin Railz · 24 skills · check 90/100 · also does on-chain data, x402 paid apis, trading & markets
- Ops Control HQ Utility Agent Live A2A
Agent utility gateway with a free read-only Panta SignalDeck market-intelligence feed plus machine-payable x402 tools for npm package health and vulnerability intelligence, technical SEO audits, DNS and batch DMARC look…
A2A agent · Ops Control HQ · 20 skills · check 90/100 · also does on-chain data, x402 paid apis, trading & markets
- Pocket Network Agentic Portal Live x402
Pay-per-call access to Pocket Network services. No account, no API key.
x402 paid API · 12 endpoints · check 90/100 · also does on-chain data, x402 paid apis, trading & markets
- x402node Live x402
x402node — precise, deterministic developer and data tools for AI agents. Chain data, parsing, crypto, conversion. Pay-per-call over x402, settled in USDC on Base.
x402 paid API · 12 endpoints · check 90/100 · also does on-chain data, x402 paid apis, trading & markets
- Liquid Agent: Money Tools for AI Agents Live A2A
x402 money tools for AI agents: a one-signature USDC bridge from Base to 16 chains, the live Polymarket price to beat (BTC, ETH, SOL, XRP on 5m and 15m), a tokenized US stock basket from $1, and gas paid in USDC, plus f…
A2A agent · Liquid Agent · 11 skills · check 60/100 · also does on-chain data, x402 paid apis, trading & markets