SPM alternatives
12 MCP servers, A2A agents and x402 APIs that also do knowledge & memory, ranked by how much they overlap with SPM (MCP server), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| SPM (this one) | MCP server | Yes | – | 55/100 |
| 艾达 ADA | MCP server | Yes | 11 | 90/100 |
| Steledger | MCP server | Yes | 9 | 90/100 |
| ZenVault | MCP server | Yes | 40 | 90/100 |
| ARBITER | MCP server | Yes | 2 | 80/100 |
| Archivist AI | MCP server | Yes | 40 | 80/100 |
| Assertion Memory | MCP server | Yes | 9 | 80/100 |
| Brainfeather | MCP server | Yes | 7 | 80/100 |
| ChangePacket | MCP server | Yes | 3 | 80/100 |
| ChronoKey | MCP server | Yes | 7 | 80/100 |
| Colour Memory | MCP server | Yes | 40 | 80/100 |
| Continuity by Ouroboros Apps | MCP server | Yes | 11 | 80/100 |
| ENYAL by Greenland AI | MCP server | Yes | 9 | 80/100 |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- 艾达 ADA Live MCP
Free APIs for AI agents: web reading, text slicing, clock, ID keys, 1MB memory. No signup or fees.
MCP server · group.hengyu.ai · 11 tools · check 90/100 · also does knowledge & memory
- Steledger Live MCP
Durable identity and memory for AI agents, anchored on the Emercoin blockchain.
MCP server · com.steledger · 9 tools · check 90/100 · also does knowledge & memory
- ZenVault Live MCP
Wake-ups, webhook inboxes, TTL memory, watches and human approval for agents. Paid per call.
MCP server · eu.zenvault · 40 tools · check 90/100 · also does knowledge & memory
- ARBITER Live MCP
Decision arbitration, action routing, workflow control, deployment remediation, persistent memory.
MCP server · fyi.grip · 2 tools · check 80/100 · also does knowledge & memory
- Archivist AI Live MCP
Official remote MCP server for Archivist AI TTRPG campaign memory: characters, sessions, and more.
MCP server · io.github.Astrotomic · 40 tools · check 80/100 · also does knowledge & memory
- Assertion Memory Live MCP
Recall your team's coding-agent memory. Install the Assertion plugin to capture it automatically.
MCP server · io.github.Assertion-AI · 9 tools · check 80/100 · also does knowledge & memory
- Brainfeather Live MCP
Long-term memory for AI coding agents: durable project facts, recalled by every MCP client.
MCP server · com.brainfeather · 7 tools · check 80/100 · also does knowledge & memory
- ChangePacket Live MCP
Web and MCP change memory with native diff UI; later calls return only what changed.
MCP server · io.github.MisfitMEdiAhouse · 3 tools · check 80/100 · also does knowledge & memory
- ChronoKey Live MCP
MCP tools: timestamps, UUID v4, gas prices, domain WHOIS, text extraction, and persistent memory.
MCP server · io.github.Dyln01 · 7 tools · check 80/100 · also does knowledge & memory
- Colour Memory Live MCP
Colour meaning, history and evidence for AI: 45,000+ source-graded colour records and 91 tools.
MCP server · io.github.DigbyO · 40 tools · check 80/100 · also does knowledge & memory
- Continuity by Ouroboros Apps Live MCP
Story continuity, novel memory, and series bible for fiction writers, shared with AI assistants
MCP server · io.github.LAHutchins91 · 11 tools · check 80/100 · also does knowledge & memory
- ENYAL by Greenland AI Live MCP
ENYAL by Greenland AI — encrypted identity & memory for AI agents (query, recall, provenance)
MCP server · ai.enyal · 9 tools · check 80/100 · also does knowledge & memory