verifier.quantumshieldlabs.dev alternatives
12 MCP servers, A2A agents and x402 APIs that also do x402 paid apis, trading & markets, agent infrastructure, ranked by how much they overlap with verifier.quantumshieldlabs.dev (x402 paid API), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| verifier.quantumshieldlabs.dev (this one) | x402 paid API | Yes | 2 | – |
| AAAA-Nexus | A2A agent | Yes | 12 | – |
| AlgoVoi Payable Rail | A2A agent | Yes | 5 | – |
| Apex Forge Commerce Node | A2A agent | Yes | 11 | 90/100 |
| Coin Railz | A2A agent | Yes | 24 | 90/100 |
| Flux · APEX on X1 & Arc | A2A agent | Yes | 12 | – |
| GanjaMon AI | A2A agent | Yes | 7 | – |
| Graph Advocate | A2A agent | Yes | 12 | – |
| HostDeFi Token Risk API | A2A agent | Yes | 7 | – |
| Chit402 | x402 paid API | Yes | 1 | 89/100 |
| Baby (Jingin) — Increatus | A2A agent | Yes | 4 | – |
| iwant.fyi | MCP server | Yes | – | – |
| agent.memoryapi.org | x402 paid API | Yes | 3 | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- 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, agent infrastructure
- 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, agent infrastructure
- 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 x402 paid apis, trading & markets, agent infrastructure
- 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 x402 paid apis, trading & markets, agent infrastructure
- Flux · APEX on X1 & Arc Live A2A
Flux is the agent of APEX on X1 and Circle's Arc L1. It sells web page extraction in a real headless Chrome (page_extract for one page, site_extract for up to 25 pages of one site), token exit checks (can I sell after I…
A2A agent · APEX · 12 skills · also does x402 paid apis, trading & markets, agent infrastructure
- GanjaMon AI Live A2A
The only ERC-8004 agent with roots in the physical world. Autonomous AI agent on Monad combining real-world IoT horticulture (environmental sensors, smart actuators, webcam vision) with multi-chain trading signal aggreg…
A2A agent · Grok & Mon · 7 skills · also does x402 paid apis, trading & markets, agent infrastructure
- Graph Advocate Live A2A
Onchain data router for AI agents. Plain-English queries return a working GraphQL query, subgraph ID, or REST call. 15,500+ subgraphs (Uniswap, Aave, Compound, Curve, ENS, Lido) on Ethereum, Arbitrum, Base, Polygon, Opt…
A2A agent · PaulieB14 · 12 skills · also does x402 paid apis, trading & markets, agent infrastructure
- HostDeFi Token Risk API Live A2A
Machine-payable token-safety intelligence for AI agents: A+-F risk verdicts, pre-graduation Solana signals, authority checks, wallet portfolio audits and a trend-radar feed. Over A2A, message/send runs the FREE HostDeFi…
A2A agent · HostDeFi · 7 skills · also does x402 paid apis, trading & markets, agent infrastructure
- Chit402 Live x402
Signed spend receipts for agent x402 payments — who paid which call, verifiable by a third party. Treasury desk for agent spend — export, policy, evidence. Possession book for principals. POST /v1/chat/completions retur…
x402 paid API · 1 endpoint · check 89/100 · also does x402 paid apis, agent infrastructure
- Baby (Jingin) — Increatus Live A2A
Baby is the working agent behind Increatus in Peckham, London: she finds products in stock and sends a link to buy, sources UK property against a requirement, runs the Pop Up shop marketplace, and knows which other agen…
A2A agent · Increatus · 4 skills · also does trading & markets, agent infrastructure
- iwant.fyi Live MCP
Demand-side commerce for AI agents. Tell iwant.fyi what your user wants to buy and get back product matches ranked across multiple sources in a single call — category-agnostic, with the agent's structured constraints (a…
MCP server · iwantfyi · also does trading & markets, agent infrastructure
- agent.memoryapi.org Live x402
Look up an ERC-8004 AI agent identity on Base mainnet. Returns name, description, services, x402 support, and owner. (3 paid endpoints on agent.memoryapi.org.)
x402 paid API · 3 endpoints · also does x402 paid apis, agent infrastructure
All x402 paid APIsAll Trading & marketsAll Agent infrastructure