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Hive Flag

Official registry AI and agents

Feature flag service for safe rollouts across the Hive agent fleet

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http hive-flag 'https://hive-mcp-flag.onrender.com/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "hive-flag": {
            "type": "http",
            "url": "https://hive-mcp-flag.onrender.com/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. hive-mcp-flag
  2. Quick start
  3. Tools and pricing
  4. Targeting rules
  5. REST API
  6. MCP example
  7. Real rails
  8. Environment
  9. Caps
  10. Out of scope (v1.1+)
  11. Hive Civilization Directory

hive-mcp-flag

Feature flag service for the A2A network — Hive Civilization. DID-keyed targeting, percentage rollouts, x402 USDC settlement on Base L2. MCP 2024-11-05. Inbound only.

Disable a runaway behavior, gate a new tool behind a DID-prefix canary, or ramp a config change to 25% of agents — without redeploying the agent. LaunchDarkly-shaped semantics, agent-native primitives.

brand : Hive Civilization gold #C08D23 (Pantone 1245 C)
spec  : MCP 2024-11-05 / Streamable-HTTP / JSON-RPC 2.0
wallet: W1 MONROE 0x15184bf50b3d3f52b60434f8942b7d52f2eb436e (Base)

Quick start

git clone https://github.com/srotzin/hive-mcp-flag
cd hive-mcp-flag
npm install
npm start
# hive-mcp-flag on :3000

Hosted endpoint: https://hive-mcp-flag.onrender.com/mcp

Tools and pricing

ToolUSD / callNotes
flag_eval$0.0005Evaluate a flag for a DID; returns resolved value and matched rule.
flag_listfreeList flags owned by a DID.
flag_describefreeFull flag definition and recent evaluations.
flag_create$0.001Create a flag with default value and targeting rules.
flag_update$0.0005Update default value or targeting rules. Owner-only.
flag_delete$0.001Tombstone a flag. Owner-only.

All payments are inbound. Submit a Base USDC tx_hash (caller → W1) in the request body or x402-tx-hash header. The shim reads the receipt from Base RPC, decodes the USDC Transfer log, and verifies recipient and amount before serving the call.

Targeting rules

Rules evaluate in declared order. First match wins. If none match, the flag's default_value is returned.

[
  { "type": "did_match",  "dids": ["did:hive:0xabc"], "value": true },
  { "type": "did_prefix", "prefix": "did:hive:",      "value": true },
  { "type": "rollout",    "percent": 25,              "value": true }
]

rollout uses SHA256(did + flag_key) mod 100, so the same (did, flag_key) pair always falls in the same bucket — sticky variant assignment with no extra storage.

REST API

POST   /v1/flag/eval                # body: { flag_key, evaluating_did, tx_hash }
GET    /v1/flag/list?owner_did=...
GET    /v1/flag/{name}              # describe
POST   /v1/flag                     # create
PATCH  /v1/flag/{name}              # update — owner-only
DELETE /v1/flag/{name}              # tombstone — owner-only
GET    /v1/flag/today               # revenue snapshot
GET    /health                      # service health
GET    /.well-known/mcp.json        # MCP discovery
POST   /mcp                         # JSON-RPC 2.0

MCP example

{
  "jsonrpc": "2.0", "id": 1, "method": "tools/call",
  "params": {
    "name": "flag_eval",
    "arguments": {
      "flag_key": "new_routing_v2",
      "evaluating_did": "did:hive:0xabc",
      "tx_hash": "0xBASE_TX_PAYING_$0.0005_USDC_TO_W1"
    }
  }
}

Real rails

SurfaceLibraryBehavior
Persistencebetter-sqlite3SQLite at /tmp/flag.db, WAL mode, transactional create/update.
Signature verificationethers.verifyMessageRecovers the signer of a message and compares against a claimed address.
Payment verificationethers.JsonRpcProviderReads tx receipt from Base RPC, decodes USDC Transfer logs, asserts to == W1 and amount >= asking_usd.

Set VERIFY_ONCHAIN=false only for local development or testing — the default and the production deployment verify on-chain.

Environment

VarDefaultPurpose
PORT3000HTTP port
ENABLEtrueMaster switch (false to brown-out)
WALLET_ADDRESSW1Base L2 receiver
BASE_RPC_URLhttps://mainnet.base.orgRPC for receipt reads
VERIFY_ONCHAINtrueRead receipts on Base before serving paid calls
MAX_FLAGS_PER_DID500Per-owner cap
DB_PATH/tmp/flag.dbSQLite file

Caps

  • MAX_FLAGS_PER_DID = 500
  • Max targeting rules per flag: 50
  • Request body limit: 256 KB

Out of scope (v1.1+)

Flag prerequisites (B depends on A), auto-ramping rollouts, push notifications and change webhooks, multi-environment namespaces, dashboard UI.

Permanently rejected: instruments, predictions, or derivatives based on flag states.

Hive Civilization · MIT · github.com/srotzin/hive-mcp-flag

Hive Civilization Directory

Part of the Hive Civilization — agent-native financial infrastructure.

Brand: #C08D23

Frequently asked questions

What is Hive Flag?

Feature flag service for safe rollouts across the Hive agent fleet

How do I install Hive Flag?

It runs as a remote server. In Claude Code: claude mcp add --transport http hive-flag 'https://hive-mcp-flag.onrender.com/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Hive Flag need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Hive Flag open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Hive Flag?

It is published by srotzin. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.