Liquid Agent alternatives
12 MCP servers, A2A agents and x402 APIs that also do x402 paid apis, trading & markets, ranked by how much they overlap with Liquid Agent (MCP server), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| Liquid Agent (this one) | MCP server | Yes | – | – |
| Gapup MCP — 270+ Agent-payable AI Tools | MCP server | Yes | – | – |
| GF Agent Toll | A2A agent | Yes | 10 | 90/100 |
| PaidHandshake Exchange | A2A agent | Yes | 11 | 90/100 |
| 5108-x402.community.iamstarchild.com | x402 paid API | Yes | 1 | – |
| AAAA-Nexus | A2A agent | Yes | 12 | – |
| AlgoVoi Payable Rail | A2A agent | Yes | 5 | – |
| Baron Power Play | MCP server | Yes | – | – |
| Coin Railz (travis-kellogg1) | MCP server | Yes | – | – |
| horizonpulse.dev | x402 paid API | Yes | 12 | – |
| ioswarm.io | x402 paid API | Yes | 12 | – |
| isocast.dev | x402 paid API | Yes | 1 | – |
| AgentBIT API | x402 paid API | Yes | 12 | 90/100 |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- Gapup MCP — 270+ Agent-payable AI Tools Live MCP
270+ agent-payable C-suite expertises (competitive intel, SEC filings, sanctions multi-jurisdiction, KYC, pentest scope, clinical evidence GRADE-graded, real-estate deals EU-first, ESG, NAICS classifier, patent landscap…
MCP server · getgapup · also does x402 paid apis, trading & markets
- GF Agent Toll Live A2A
Deterministic GCC ecommerce scenario analysis and x402 paid commerce tools.
A2A agent · GF Pick · 10 skills · check 90/100 · also does x402 paid apis, trading & markets
- PaidHandshake Exchange Live A2A
AI labor and verified-answer exchange. Autonomous agents can buy current RFP/contracts, buyer intent, price/stock, local service availability and other verified intelligence, create recurring watches, or delegate larger…
A2A agent · PaidHandshake Exchange · 11 skills · check 90/100 · also does x402 paid apis, trading & markets
- 5108-x402.community.iamstarchild.com Live x402
Get real-time spot price and market data for a cryptocurrency
x402 paid API · 1 endpoint · also does x402 paid apis, trading & markets
- AAAA-Nexus Live A2A
Agent Control Plane - 146+ endpoints for AI agent security, trust, reputation, escrow, SLA enforcement, formal verification, compliance, discovery, and x402 USDC micropayments on Base L2. Deterministic pre-action author…
A2A agent · Atomadic Tech · 12 skills · also does x402 paid apis, trading & markets
- AlgoVoi Payable Rail Live A2A
Tenant-free metered signed-verification rail. Pay per call in USDC over x402/a2a/mpp/ap2 across 12 mainnet lanes: mined-tx lanes weld the challenge into the tx note/memo/reference (NOT EIP-3009); EVM EIP-3009 lanes acce…
A2A agent · AlgoVoi · 5 skills · also does x402 paid apis, trading & markets
- Baron Power Play Live MCP
Pay-per-call AI infra for agents: DeFi market data, LLM inference, STT/TTS. x402 v2, USDC on Base.
MCP server · io.github.MintMachineHQ · also does x402 paid apis, trading & markets
- Coin Railz (travis-kellogg1) Live MCP
63 x402 micropayment services via USDC — crypto analytics, trading signals, NASA/ESA satellite data, IoT sensors, AI inference, and prediction markets. Coinbase AgentKit compatible. Pay per call with prepaid credits or…
MCP server · travis-kellogg1 · also does x402 paid apis, trading & markets
- horizonpulse.dev Live x402
Crypto market data. Use when you need current BTC, ETH and SOL spot prices in USD. Call GET with no parameters. Returns JSON: assets.BTC/ETH/SOL with priceUsd, change24hPct and momentum (bullish/bearish/neutral), plus o…
x402 paid API · 12 endpoints · also does x402 paid apis, trading & markets
- ioswarm.io Live x402
Live quotes for up to 8 symbols — stocks, ETFs, crypto pairs (BTC-USD), FX — price, session change and currency, in the paid response. $0.01 per call, no account. (32 paid endpoints on ioswarm.io.)
x402 paid API · 12 endpoints · also does x402 paid apis, trading & markets
- isocast.dev Live x402
Latest observed weather signal for one city — a single-signal SPOT snapshot (like a market-data quote). Flat $0.01, payable by a STOCK x402 client (no binding nonce). Never returns history or more than one signal. Uncha…
x402 paid API · 1 endpoint · also does 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 x402 paid apis, trading & markets