FlexYield — blockchain RPC gateway alternatives
12 MCP servers, A2A agents and x402 APIs that also do on-chain data, ranked by how much they overlap with FlexYield — blockchain RPC gateway (MCP server), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| FlexYield — blockchain RPC gateway (this one) | MCP server | Yes | – | – |
| Blixtworks | MCP server | Yes | – | – |
| Agent Economy OS 2047 — A2A Commerce Directory | A2A agent | Yes | 5 | 90/100 |
| Agent Einstein — Crypto & Market Intelligence | MCP server | Yes | 40 | 90/100 |
| Axiom Agentic Tools | MCP server | Yes | 9 | 90/100 |
| Basis Protocol | MCP server | Yes | 7 | 90/100 |
| Bitrefill x402 | x402 paid API | Yes | 8 | 90/100 |
| Feeless402 Rail Quote | A2A agent | Yes | 2 | 90/100 |
| Laso Finance | x402 paid API | Yes | 8 | 90/100 |
| MEV Intelligence | MCP server | Yes | 10 | 90/100 |
| Name Whisper — ENS Intelligence Layer | MCP server | Yes | 40 | 90/100 |
| Overwing | MCP server | Yes | 40 | 90/100 |
| PaidHandshake Exchange | A2A agent | Yes | 11 | 90/100 |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- Blixtworks Live MCP
63 pay-per-call tools for agents: vision, text, data, web, blockchain. USDC on Base via x402.
MCP server · com.blixtworks.www · also does on-chain data
- Agent Economy OS 2047 — A2A Commerce Directory Live A2A
Public A2A discovery assistant for AI agents that want to discover four experimental x402 services on Base: pre-action policy checks, owner-signed spending rules and public USDC transfer receipt evidence. This directory…
A2A agent · Agent Economy OS 2047 · 5 skills · check 90/100 · also does on-chain data
- Agent Einstein — Crypto & Market Intelligence Live MCP
AI price forecasts, whale flows, market sentiment and prediction signals. 18 tools free, no account.
MCP server · io.emc2ai · 40 tools · check 90/100 · also does on-chain data
- Axiom Agentic Tools Live MCP
x402-paid Base agent tools (USDC). 5 deterministic tools. No API keys. No NFT pass.
MCP server · io.github.0xAxiom · 9 tools · check 90/100 · also does on-chain data
- Basis Protocol Live MCP
Attested risk scores for stablecoins, DeFi protocols and wallets, with receipts.
MCP server · io.github.basis-protocol · 7 tools · check 90/100 · also does on-chain data
- Bitrefill x402 Live x402
Buy gift cards, eSIMs, mobile top-ups and prepaid cards with USDC via x402. 10,000+ brands across 180+ countries. No API keys or Bitrefill account required — wallet payment and optional SIWX sign-in only.
x402 paid API · 8 endpoints · check 90/100 · also does on-chain data
- Feeless402 Rail Quote Live A2A
Read-only x402 pricing agent: send it any x402 (HTTP 402 Payment Required) API URL and it fetches the live payment quote without paying, then prices the same call on every rail the server offers — gas rails floor micro-…
A2A agent · Feeless402 · 2 skills · check 90/100 · also does on-chain data
- Laso Finance Live x402
Convert stablecoins (USDC, USDT, DAI) to spendable prepaid cards and gift cards instantly. Works with Google Pay. Multi-chain: Ethereum, Solana, Stellar, Arbitrum, Base, Polygon.
x402 paid API · 8 endpoints · check 90/100 · also does on-chain data
- MEV Intelligence Live MCP
Real-time Ethereum liquidation intelligence for AI agents and MEV bots.
MCP server · io.advalorem.mev · 10 tools · check 90/100 · also does on-chain data
- Name Whisper — ENS Intelligence Layer Live MCP
44 MCP tools to search, value, register, trade, and manage ENS names. AI-powered intelligence layer.
MCP server · ai.namewhisper · 40 tools · check 90/100 · also does on-chain data
- Overwing Live MCP
Guardrails for LLM output: pass / fail / review verdicts and one recommended action. Hosted or npm.
MCP server · ai.overwing · 40 tools · check 90/100 · also does on-chain data
- 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 on-chain data