Antigravity Sovereign Agent alternatives
12 MCP servers, A2A agents and x402 APIs that also do on-chain data, coding & dev tools, x402 paid apis, ranked by how much they overlap with Antigravity Sovereign Agent (A2A agent), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| Antigravity Sovereign Agent (this one) | A2A agent | Yes | 9 | – |
| Bounty Engineer Autonomous Mission Commerce | A2A agent | Yes | 24 | 90/100 |
| verdixapi.com | x402 paid API | Yes | 5 | – |
| Apex Forge Commerce Node | A2A agent | Yes | 11 | 90/100 |
| Coin Railz | A2A agent | Yes | 24 | 90/100 |
| 2s | A2A agent | Yes | 1 | – |
| Agent Zero | A2A agent | Yes | 12 | – |
| Ops Control HQ Utility Agent | A2A agent | Yes | 20 | 90/100 |
| Liquid Agent: Money Tools for AI Agents | A2A agent | Yes | 11 | 60/100 |
| Trust Check | A2A agent | Yes | 4 | – |
| Agent Products | A2A agent | Yes | 12 | – |
| AgentRank (Crest Deployment Systems LLC) | A2A agent | Yes | 3 | – |
| agents.dyoeway.org | x402 paid API | Yes | 12 | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- 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, coding & dev tools, x402 paid apis
- verdixapi.com Live x402
Verdix standard ($0.10): call before larger or repeated payments to an EVM address on Base, when an address-age read is not enough. Sanctions, scam/phishing lists, address poisoning and contract/deployer signals, plus o…
x402 paid API · 5 endpoints · also does on-chain data, coding & dev tools, security & trust
- 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, security & trust
- 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, security & trust
- 2s Live A2A
The (most) everything API for AI agents, exposed as an A2A agent. This agent's skill is endpoint DISCOVERY: send a natural-language task and it returns the best-matching 2s endpoints (path, method, price, description) f…
A2A agent · 2s · 1 skill · also does on-chain data, x402 paid apis, security & trust
- Agent Zero Live A2A
Comprehensive agent intelligence service for the ERC-8004 agent economy. Continuously scans and indexes ERC-8004 agents across Base and Ethereum — enriching on-chain registration metadata with live endpoint data, on-cha…
A2A agent · Agent Zero · 12 skills · also does on-chain data, x402 paid apis, security & trust
- 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, coding & dev tools, x402 paid apis
- 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, coding & dev tools, x402 paid apis
- Trust Check Live A2A
Due diligence for agents. Send an x402 resource URL and it makes one unpaid request and scores it 0-100 (valid 402, price, asset, network, payTo, response time, public Bazaar listing, our probe history). Send a Rooms @h…
A2A agent · Rooms by Aurmada · 4 skills · also does on-chain data, x402 paid apis, security & trust
- Agent Products Live A2A
Cloud infrastructure services for autonomous AI agents. 20 services: decision audit, persistent memory, fleet monitoring, content filtering, task handoff, wallet management, identity verification, distributed scheduling…
A2A agent · Pangeon Corp · 12 skills · also does on-chain data, coding & dev tools, x402 paid apis
- AgentRank (Crest Deployment Systems LLC) Live A2A
Settlement-grounded reputation for AI agents. Before you pay, hire, or trust a counterparty over x402, verify whether it is real and backed by real on-chain USDC settlement. AgentRank returns a 0-1000 score that is a re…
A2A agent · Crest Deployment Systems LLC · 3 skills · also does on-chain data, coding & dev tools, x402 paid apis
- agents.dyoeway.org Live x402
Check whether a website, business, or wallet is a scam before an agent trusts or pays it — fraud, phishing and rug-risk screening. Returns verdict (safe/caution/avoid), trust_score, domain age, red_flags. Input: ?target…
x402 paid API · 12 endpoints · also does on-chain data, x402 paid apis, security & trust
All On-chain dataAll Coding & dev toolsAll x402 paid APIsAll Security & trust