Bilinc

Hosted memory for AI agents. Save what your agents learn, recall it before they act, see who wrote each memory and what changed, and roll back when a run goes wrong.

The bilinc package on PyPI is the Python SDK, the bilinc CLI and the stdio MCP adapter for Bilinc Cloud. Its source is ReARCLabs/bilinc; the hosted service is not part of the package.

Start in 60 seconds

Claude, ChatGPT or Codex, without Python. In Claude, open Customize → Connectors → Add custom connector, name it Bilinc and paste https://mcp.bilinc.space/mcp. Sign in and choose read-only or read and write. In Claude Code:

claude mcp add --transport http --scope user bilinc https://mcp.bilinc.space/mcp

The same address works in ChatGPT and Codex: remote MCP guide.

Python, the CLI or any MCP client.

pip install -U bilinc
bilinc login        # browser sign-in, free, no card required
bilinc quicktest    # one hosted commit, one recall and a status check

bilinc login saves an API key for this computer with owner-only permissions; the key never appears in a URL or your terminal. Without a browser, use bilinc login --device. For CI and scripts, set BILINC_API_KEY.

Where Bilinc sits

Every write records where it came from and returns a version you can pass back, so a change is refused if the memory moved since you read it. Forget requires a reason and revise accepts one. In the remote connector, recall shows when each memory was last confirmed and marks entries past their review window as possibly outdated; nothing is hidden or deleted by that check.

Similar is not the same as current

Use Bilinc when:

• a long-running agent (coding, support, research, a personal assistant) needs earlier decisions before a risky action;
• you need to know which run, tool or person wrote a piece of agent state;
• a bad run wrote wrong state and you need a way back, not a manual cleanup;
• several agents or teammates share one memory and you want per-key access and visible usage.

Reach for something else when you only need semantic search over documents (a vector database is the simpler tool), when you need an Apache-2.0, fully self-hosted runtime (this package is cloud-only and BUSL-1.1), or when you want the memory layer to also be your agent framework.

Python SDK

from bilinc import CloudClient

client = CloudClient()  # reads BILINC_API_KEY or the key saved by `bilinc login`

# Write, and keep the version for optimistic concurrency.
written = client.commit("agent.goal", {"ship": "reliable memory"}, memory_type="semantic")
results = client.recall("agent goal", limit=5)

# Correct something you already know. Fails if the key does not exist.
client.revise("agent.goal", {"ship": "verifiable memory"},
              reason="scope corrected", expected_version=written["entryVersion"])

# Checkpoint before risky work, then see what changed.
snapshot = client.create_snapshot(label="before-autonomous-run")["snapshot"]
client.diff(snapshot["id"])

# Recover. The preview is free; executing needs its token.
preview = client.rollback_preview(snapshot["id"], reason="undo bad agent run")
client.rollback(snapshot["id"], confirmation_token=preview["confirmationToken"],
                reason="undo bad agent run")

# Review what is stored. Listing, history and export are free reads.
for entry in client.iter_memories(prefix="agent."):
    print(entry["key"], entry["updatedAt"])
client.history("agent.goal")
client.confirm("agent.goal")   # still accurate; costs one write

# Take a memory out of use. A reason is required and recorded.
client.forget("agent.goal", reason="superseded by the planner service")

CLI

bilinc status                          # plan, capabilities, limits, usage
bilinc commit --key agent.goal --value '{"ship":"reliable memory"}'
bilinc recall --query "agent goal"
bilinc revise --key agent.goal --value '{"ship":"verifiable memory"}' --reason "scope corrected"
bilinc list --prefix agent.            # keys, types, update times, value previews
bilinc history agent.goal              # recorded changes, newest first
bilinc snapshot create --label before-autonomous-run
bilinc diff --from-snapshot snap_...
bilinc export -o bilinc-export.json    # full values; the file is readable only by you
bilinc forget --key agent.goal --reason "superseded by the planner service"

Rollback is two steps, and execute never prompts, so it is safe in automation:

bilinc rollback preview --snapshot snap_... --reason "undo bad agent run"
bilinc rollback execute --snapshot snap_... --reason "undo bad agent run" \
  --confirmation-token <token-from-preview>

MCP adapter

The stdio adapter works with any MCP client: Claude Code, Codex, Cursor, Hermes Agent, opencode and others. After bilinc login, let the CLI write the setup:

bilinc mcp install --client claude-code     # prints a ready `claude mcp add ...` command
bilinc mcp install --client claude-desktop  # prints the config and where Claude Desktop keeps it
bilinc mcp install                          # plain mcpServers JSON for any other client

The config carries no key; the adapter reads the one bilinc login saved. On a machine without one, add "env": { "BILINC_API_KEY": "..." }.

The remote connector at https://mcp.bilinc.space/mcp has ten tools; a read-only connection lists only the four read tools. Client guides: Claude Code · Codex · Cursor · any MCP client.

Forget and purge

Since 2.5.0: client.forget(key, reason=..., purge=True), bilinc forget --key ... --reason ... --purge, or "purge": true in the REST API also removes the memory's stored content from storage and history. It works on a memory you forgot earlier and cannot be undone. See the privacy policy for what is kept and for how long.

Hosted API

All endpoints live under https://bilinc.space. Memory operations need an API key and an active Bilinc Cloud plan; the free plan needs no card.

Send an Idempotency-Key header on any write you might retry: the same key with the same payload replays the original result and is billed once; a different payload is refused with 409 idempotency_conflict. Saves that contain a credential, such as an API key, token or private key, are refused with secret_detected and the value is never echoed back.

What's new in 2.6.0

• Sorted lists: list memories newest or oldest first, and filter them by which app saved them, from the SDK, the CLI, the bilinc MCP adapter and the dashboard.
• Turkish search: hosted search ignores case, Turkish dotted and dotless I, and diacritics, so girisimci finds Girişimci.
• Clearer write results: when a credential-looking field is stored redacted, the response says which field.
• Purge from the MCP adapter: the bilinc stdio MCP adapter's forget tool takes purge.

Every release: changelog.

Links

• bilinc.space · Docs · Install guide · Pricing (free plan, no card) · Changelog · Trust
• Compare: vector memory · Mem0 · Zep · Letta
• Guides: What is AI agent memory? · Rolling back an agent memory write · Auditing what an agent remembered
• For machines: llms.txt · ai-index.json

Feedback and security

Questions, bugs and ideas: GitHub Issues. Report security issues privately to bilincsupport@rearclabs.com (see security.txt). Please keep memory values, API keys and production logs out of issues and screenshots.

License

Business Source License 1.1, licensed by ReARC Labs Inc. See LICENSE.