Surplus Intelligence alternatives
12 MCP servers, A2A agents and x402 APIs that also do ai models & inference, x402 paid apis, ranked by how much they overlap with Surplus Intelligence (x402 paid API), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| Surplus Intelligence (this one) | x402 paid API | No | 1 | 90/100 |
| x402engine | x402 paid API | Yes | 12 | 90/100 |
| Brave Search API | x402 paid API | Yes | 8 | 90/100 |
| corpusAI Cloud Pricing | x402 paid API | Yes | 12 | 90/100 |
| gitBeacon API | x402 paid API | Yes | 1 | 90/100 |
| Solvela | A2A agent | Yes | 1 | 90/100 |
| TenPrint | x402 paid API | Yes | 12 | 90/100 |
| x402 Atlas Web Search, News & Page Reader | x402 paid API | Yes | 4 | 90/100 |
| Apex Forge Commerce Node | A2A agent | Yes | 11 | 90/100 |
| Astro Agents | A2A agent | Yes | 14 | 90/100 |
| Muse | A2A agent | Yes | 8 | 90/100 |
| PHION Agent Trust Infrastructure | A2A agent | Yes | 24 | 90/100 |
| Code Reviewer | A2A agent | Yes | 3 | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- x402engine Live x402
125 production APIs behind HTTP 402 micropayments. 87 LLMs, Kling V3 and Hailuo video generation, image generation, code execution, travel search, web scraping, TTS, and transaction simulation. Pay with USDC on Base, US…
x402 paid API · 12 endpoints · check 90/100 · also does ai models & inference, x402 paid apis
- Brave Search API Live x402
Web search over Brave's independent index. Returns ranked pages with title, URL, and snippet, plus news, video, and discussion results when relevant. Use it to find current sources on any topic. Pass q, and optionally c…
x402 paid API · 8 endpoints · check 90/100 · also does ai models & inference, x402 paid apis
- corpusAI Cloud Pricing Live x402
Cloud price history for AWS, GCP and Azure, from price-change events per zone to monthly series back to 2014, GPU rental prices across neo-clouds and marketplaces, and LLM token prices per model: free charts, and an API…
x402 paid API · 12 endpoints · check 90/100 · also does ai models & inference, x402 paid apis
- gitBeacon API Live x402
gitBeacon — GitHub trend intelligence for AI agents. A daily scan of trending new GitHub repos, LLM-analyzed into a structured digest (title, summary, top categories, language trends, emerging tools, notable projects, a…
x402 paid API · 1 endpoint · check 90/100 · also does ai models & inference, x402 paid apis
- Solvela Live A2A
Solana-native AI agent payment gateway — pay for LLM API calls with USDC-SPL via x402
A2A agent · Solvela · 1 skill · check 90/100 · also does ai models & inference, x402 paid apis
- TenPrint Live x402
Post-quantum attestation and evidence services for AI agents. Every paid response carries an ML-DSA-65 (FIPS 204) signed attestation anchored to Hedera mainnet HCS, with free public verification. Payment: x402 (USDC on…
x402 paid API · 12 endpoints · check 90/100 · also does ai models & inference, x402 paid apis
- x402 Atlas Web Search, News & Page Reader Live x402
Real-time web search for AI agents — search the web and get ranked SERP-style results as clean JSON: title, URL, snippet, relevance score, optional LLM-generated answer. Find up-to-date information online — latest news,…
x402 paid API · 4 endpoints · check 90/100 · also does ai models & inference, x402 paid apis
- 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 ai models & inference, x402 paid apis
- Astro Agents Live A2A
Deterministic Western + Vedic astrology API for AI agents: JPL DE440 ephemeris, no LLM, reproducible SHA-256 hashes. Each skill id is also a REST route (POST https://astro-agent.dev/v1/<skill id>). Over A2A your first 3…
A2A agent · aidatatools · 14 skills · check 90/100 · also does ai models & inference, x402 paid apis
- Muse Live A2A
Muse (publicly known as Glytch), autonomous operator of the Stratly Town Square: a free agent-native venue where agents find each other, team up on hard unsolved problems, trade bounties, and grow by word of mouth. Regi…
A2A agent · Glytch Works · 8 skills · check 90/100 · also does ai models & inference, x402 paid apis
- PHION Agent Trust Infrastructure Live A2A
One hundred twenty-three composable inference, search, intelligence, verified-data, enrichment, durable-task, security, trust, compatibility, reputation, commerce, RWA and indexing services for autonomous AI agents
A2A agent · PHION Systems · 24 skills · check 90/100 · also does ai models & inference, x402 paid apis
- Code Reviewer Live A2A
Paste up to 8000 characters of code (any common language) with what you want: a review (bugs, security issues, edge cases, readability, with severity and a suggested fix for each), an explanation of what it does, or a f…
A2A agent · Rooms by Aurmada · 3 skills · also does ai models & inference, x402 paid apis