Nexus Memory alternatives
12 MCP servers, A2A agents and x402 APIs that also do knowledge & memory, security & trust, ranked by how much they overlap with Nexus Memory (MCP server), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| Nexus Memory (this one) | MCP server | Yes | – | – |
| Ambr | A2A agent | Yes | 6 | 90/100 |
| x402-data-api.onrender.com | x402 paid API | Yes | 2 | – |
| Crimson Crawler | MCP server | Yes | – | – |
| CVElens Vulnerability Intelligence | MCP server | Yes | – | – |
| Dabra MCP | MCP server | Yes | – | – |
| DataNexus MCP (dev-7bd0) | MCP server | Yes | – | – |
| EchelonGraph CVE & Exposure | MCP server | Yes | – | – |
| Gemalli B2B Trade | MCP server | Yes | – | – |
| HubVibe: Pay-per-Call Agent Tools: Web Search, Email Verify, KYC Screening, Sto… | MCP server | Yes | – | – |
| LiveDataLink | MCP server | Yes | – | – |
| middleBrick | API-Security | MCP server | Yes | – | – |
| nist-nvd-mcp-server | MCP server | Yes | – | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- Ambr Live A2A
The liability record for autonomous agents. Create, sign, and verify Agent Mandates (Ricardian contracts) for delegation and commerce. Dual-format output: human-readable legal text plus machine-parsable JSON, linked by…
A2A agent · Ambr · 6 skills · check 90/100 · also does knowledge & memory, security & trust
- x402-data-api.onrender.com Live x402
IP geolocation: country, region, city, coordinates, and timezone for any IPv4 or IPv6 address. Fast in-memory lookup for analytics, fraud, and personalization agents. (2 paid endpoints on x402-data-api.onrender.com.)
x402 paid API · 2 endpoints · also does knowledge & memory, security & trust
- Crimson Crawler Live MCP
Enrich, search, assess, and manage threat intelligence through 80+ typed MCP tools.
MCP server · com.crimsoncrawler · also does security & trust
- CVElens Vulnerability Intelligence Live MCP
CVE triage in one call: NVD, CVSS, CISA KEV, EPSS, public exploits and an explained risk score.
MCP server · com.cvelens · also does security & trust
- Dabra MCP Live MCP
Brazilian company and person data by CNPJ/CPF: registry, partners, tax status, sanctions, lawsuits.
MCP server · com.dabradata · also does security & trust
- DataNexus MCP (dev-7bd0) Live MCP
55 tools. Verified public data — CVE/SBOM security audits, licence compliance, frontend security scanning, nonprofit 990 filings, federal contracts, NPI lookups, patents, and domain intelligence
MCP server · dev-7bd0 · also does security & trust
- EchelonGraph CVE & Exposure Live MCP
CVE, KEV, EPSS, SBOM and advisory lookups; per-CVE exposure from Shodan data (© Shodan). Keyless.
MCP server · io.echelongraph · also does security & trust
- Gemalli B2B Trade Live MCP
Global B2B trade: verified manufacturers, product search, sanctions screening, HS codes.
MCP server · com.gemalli · also does security & trust
- HubVibe: Pay-per-Call Agent Tools: Web Search, Email Verify, KYC Screening, Sto… Live MCP
70+ pay-per-call tools for AI agents: web search, email verify, KYC, stocks, crypto, news, data
MCP server · io.github.Its-fortunatefolly · also does security & trust
- LiveDataLink Live MCP
Over 2 million indexed public records. One MCP endpoint. LiveDataLink is a hosted Streamable HTTP MCP for source-linked public data, with 294 tools across 60 domains. Query government, regulatory, financial, transportat…
MCP server · blackboxfoundry · also does security & trust
- middleBrick | API-Security Live MCP
Scan any API for OWASP Top 10 vulnerabilities and get a security risk score. Covers authentication, authorization (BOLA/BFLA), injection, data exposure, rate limiting, GraphQL, and LLM security.
MCP server · middlebrick · also does security & trust
- nist-nvd-mcp-server Live MCP
Search and audit NIST NVD CVEs by keyword, severity, CWE, CISA KEV status, and CPE.
MCP server · cyanheads · also does security & trust