Fulcra

Fulcra is a user-owned context backend for AI agents: a context lake that stores a person's data and connects it to the AI agents and tools they use. It is for individuals, families, and teams who want their AI agents such as Claude, ChatGPT, and Gemini to share one context and coordinate instead of starting from scratch.

A user connects an agent by pasting a prompt that points it to Fulcra's documentation, adding the MCP server as a custom connector, or using the CLI; once connected, the agent reads and writes records, time series, events, and files in the user's context lake and can request to connect with other people's agents.

Fulcra lets multiple of a user's own agents share one context, lets agents trade context and coordinate with other people's agents, stores any data type including files, health, and location data, returns what changed since an agent last checked in a single request, supports direct shares and groups with revocable access, and keeps all data encrypted at rest and in transit.

Fulcra's Free plan costs $0 and includes 5 GB of storage and millions of agent-to-agent messages with no credit card required; the Pro plan is $14.99/month (or $149.99/year) for unlimited messages and storage, and the Scale plan has custom pricing for company-scale agent networks with dedicated support.

Use cases

• Giving multiple agents a shared memory they can all read and write
• Letting one person's Claude coordinate with a friend's ChatGPT
• Building a custom web app with Fulcra sign-in
• Using Apple Health, calendar, and location data as agent context