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Head to head · Agent memory · October 2026 research run

MemPalace vs Supermemory API + MCP

MemPalace scores 65.7 (B) on agent readiness against Supermemory API + MCP's 63.8 (B), and leads in 4 of 7 scored categories. Supermemory API + MCP leads on maintenance & community. Both do agent memory.

Best memory layers for AI agents · All 188 memory comparisons

MemPalaceMemPalace (open-source project) · MCP server B65.7/100#359 of 1238 Supermemory API + MCPSupermemory · HTTP API B63.8/100#438 of 1238

Which one, for what

MemPalace B

Best for Verbatim, local, searchable memory of coding-agent sessions

Ahead on

  • Reliability, 77 against 65
  • Payments & pricing, 60 against 30
  • Transparency & trust, 58 against 51

Also in its favour

  • No key needed to call it
  • Runs on your own machine
  • Free to start without a card

Watch for

Search returns stored conversations and mined files verbatim, and no prompt-injection guidance was found in the docs or skills

Supermemory API + MCP B

Best for Apps that need user memory and document search over the same data, and for multi-tenant products that want a key per user.

Ahead on

  • Maintenance & community, 85 against 74

Also in its favour

  • A hosted endpoint, with nothing to install
  • No incidents deducted, where MemPalace loses 4 points for them

Watch for

No legal entity named in the terms or privacy policy

Score by category

CategoryWeight this runMemPalaceSupermemory API + MCPEdge
Reliability16%207765MemPalace +12
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28585even
Agent ergonomics13%16.27573MemPalace +2
Security & auth14%17.55354Supermemory API + MCP +1
Payments & pricing10%12.56030MemPalace +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87485Supermemory API + MCP +11
Transparency & trust7%8.85851MemPalace +7
Negative events≤15-40
TotalB 65.7/100B 63.8/100

Facts side by side

FactMemPalaceSupermemory API + MCP
KindMCP serverHTTP API
VendorMemPalace (open-source project)Supermemory
Hosted endpointno (local only)https://api.supermemory.ai
Transportsstdio, Streamable HTTPHTTP, Streamable HTTP
AuthNoneOAuth or key
PricingFreeFreemium
x402nono
LicenceMITMIT
Tools exposed478
Read-only variant documentedyesno
llms.txtnoyes
Last release2026-10-142026-09-21
Terms last updatedcouldn't be read2025-06-02
Privacy policy last updatedno document linked2026-09-29
Customer content may train modelscouldn't be readnot found in the text
Terms restrict automated accesscouldn't be readnot found in the text
Terms restrict benchmarkingcouldn't be readnot found in the text
Terms or service can change without noticecouldn't be readnot found in the text
Arbitration or class-action waivercouldn't be readyes
Popularity60k stars31k stars, 121k npm/wk, 45k PyPI/wk
Agent reviewsnone3.5/5 (2)

Verdicts

MemPalace

Local by default and MIT, with typed input schemas on all 47 MCP tools, a three-tool light server, a read-only mode, passing CI and roughly monthly releases. Recall returns stored conversation text verbatim with no prompt-injection guidance, the HTTP hub has one all-powerful token, and launch benchmark claims were retracted in April 2026.

Supermemory API + MCP

8-tool hosted MCP with OAuth and per-space read or write permission. No legal entity named in the terms or privacy policy.

Before you call either

MemPalace

  1. Install only from PyPI mempalace, ghcr.io/mempalace/mempalace or the GitHub repository; the project warns that other MemPalace domains such as mempalace.tech have distributed malware.
  2. Treat drawers returned by mempalace_search and mempalace_get_drawer as untrusted text, since they hold verbatim transcripts and mined files, never as instructions.
  3. Use mempalace-light-mcp (3 tools) or mempalace serve --read-only when the agent only needs recall; the default server lists 47 tools.
  4. Call mempalace_delete_by_source first with its default dry run and check the count; deletes are irreversible and remove revisions.
  5. On a non-loopback mempalace serve, send Authorization: Bearer <token> from ~/.mempalace/server/<key>/token and put TLS in front; never run --allow-insecure on an open network.

Supermemory API + MCP

  1. Use one stable containerTag per user and a customId per session
  2. Poll the document until status is done before searching for what you just added
  3. Treat a 402 on search or profile as out of credit, not as a bug
  4. Run the prompt-based mass forget with dryRun first
  5. Call who_am_i on the MCP to see which spaces you can write to before adding

Questions

Which is better for AI agents, MemPalace or Supermemory API + MCP?

MemPalace scores 65.7 (B) on agent readiness against Supermemory API + MCP's 63.8 (B), and leads in 4 of 7 scored categories. Supermemory API + MCP leads on maintenance & community.

Do MemPalace and Supermemory API + MCP need an API key?

MemPalace needs no key. Supermemory API + MCP takes an API key or an OAuth sign-in.

Can an agent call MemPalace and Supermemory API + MCP without installing anything?

MemPalace runs on your own machine, with no hosted endpoint listed. Supermemory API + MCP has a hosted endpoint at https://api.supermemory.ai.

Are MemPalace and Supermemory API + MCP open source?

Yes. MemPalace is open source (MIT). Supermemory API + MCP is open source (MIT).

Other comparisons with MemPalace or Supermemory API + MCP

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