apex-mcp-server/docs/VECTOR.md

Vector MCP Server — Tool Reference

Overview

The Vector MCP Server exposes blockchain tools that AI agents can use to interact with the Vector network. All tools use the vector_ prefix and communicate with Vector via Ogmios (chain queries) and the submit API (transaction submission).

Prerequisites

1. A funded Vector wallet (15 or 24-word mnemonic)
2. Access to Vector network endpoints (Ogmios, submit API, Koios)
3. Node.js >= 14.0.0

Tools

vector_get_balance

Get ADA and token balances for any Vector address.

Parameters:

• address (string, required) — Vector address to check (addr1...)

Example prompt: "What's the balance of addr1qx..."

vector_get_address

Get the agent's own wallet address, balance, and token holdings.

Parameters: None

Example prompt: "What's my wallet address and balance?"

vector_get_utxos

List unspent transaction outputs for an address or the agent's wallet.

Parameters:

• address (string, optional) — Address to query. Uses agent's wallet if omitted.

Example prompt: "Show me the UTxOs in my wallet"

vector_send_apex

Send ADA from the agent's wallet to a recipient. Enforces spend limits.

Parameters:

• recipientAddress (string, required) — Recipient address (addr1...)
• amount (number, required) — Amount of ADA to send (minimum 1)
• metadata (string, optional) — Transaction metadata in JSON format

Example prompt: "Send 5 ADA to addr1qy..."

vector_send_tokens

Send Vector native tokens from the agent's wallet.

Parameters:

• recipientAddress (string, required) — Recipient address (addr1...)
• policyId (string, required) — Token policy ID
• assetName (string, required) — Asset name (can be empty)
• amount (string, required) — Amount of tokens to send
• adaAmount (number, optional) — ADA to include with tokens

Example prompt: "Send 100 of token with policy abc123... to addr1qy..."

vector_get_spend_limits

Check current spend limits, daily usage, and recent transaction audit log.

Parameters: None

Example prompt: "What are my current spend limits?"

vector_build_transaction

Build a complex multi-output transaction with metadata. Optionally sign and submit.

Parameters:

• outputs (array, required) — Array of { address, lovelace, assets? } objects
• metadata (string, optional) — JSON metadata (attached under label 674)
• submit (boolean, optional) — If true, sign and submit. If false/omitted, return unsigned CBOR.

Example prompt: "Build a transaction sending 5 ADA to addr1qx... and 3 ADA to addr1qy..."

vector_dry_run

Simulate a transaction without submitting — returns fee estimate and validation.

Parameters:

• txCbor (string, optional) — Hex CBOR of a built transaction to evaluate
• outputs (array, optional) — If no txCbor, build a TX from these outputs and evaluate
• metadata (string, optional) — JSON metadata when building from outputs

Example prompt: "How much would it cost to send 10 ADA to addr1qx...?"

vector_get_transaction_history

Get transaction history for an address via Koios indexed queries.

Parameters:

• address (string, optional) — Address to query. Uses agent's wallet if omitted.
• limit (number, optional) — Number of transactions (default: 20, max: 50)
• offset (number, optional) — Pagination offset (default: 0)

Example prompt: "Show me my recent transactions"

vector_deploy_contract

Deploy a Plutus/Aiken smart contract by locking funds at its script address.

Parameters:

• scriptCbor (string, required) — Compiled script CBOR hex
• scriptType (string, required) — "PlutusV1", "PlutusV2", or "PlutusV3"
• initialDatum (string, optional) — Datum CBOR hex (default: void d87980)
• lovelaceAmount (number, optional) — ADA to lock in lovelace (default: 2 ADA)

Example prompt: "Deploy this smart contract with 5 ADA locked"

vector_interact_contract

Interact with a deployed smart contract — lock funds or spend from it.

Parameters:

• scriptCbor (string, required) — Compiled script CBOR hex
• scriptType (string, required) — "PlutusV1", "PlutusV2", or "PlutusV3"
• action (string, required) — "spend" or "lock"
• redeemer (string, optional) — Redeemer CBOR hex (for spend, default: void)
• datum (string, optional) — Datum CBOR hex (for lock, default: void)
• lovelaceAmount (number, optional) — ADA to lock in lovelace (for lock)
• utxoRef (object, optional) — { txHash, outputIndex } for specific UTxO (for spend)
• assets (object, optional) — Native assets for lock: { "unit": "quantity" }

Example prompt: "Collect funds from the escrow contract at addr1..."

Safety Controls

The server enforces configurable spend limits:

• Per-transaction limit — Maximum ADA per single transaction (default: 100 ADA)
• Daily limit — Maximum ADA per 24-hour period (default: 500 ADA)
• Audit log — All transactions are logged with timestamp, amount, and recipient
• Persistent audit log — Audit log is written to a JSON file that survives server restarts. Daily spend is recalculated from the log on startup.

Limits are configured via environment variables:

VECTOR_SPEND_LIMIT_PER_TX=100000000   # 100 ADA in lovelace
VECTOR_SPEND_LIMIT_DAILY=500000000    # 500 ADA in lovelace
VECTOR_AUDIT_LOG_PATH=./vector-audit-log.json  # Audit log file path

Network Endpoints

Service	URL	Protocol
Ogmios	ogmios.vector.testnet.apexfusion.org	HTTP JSON-RPC + WebSocket
Submit API	submit.vector.testnet.apexfusion.org/api/submit/tx	HTTP POST (CBOR)
Koios	koios.vector.testnet.apexfusion.org	REST API
Explorer	vector.testnet.apexscan.org	Web UI

Error Handling

All tools return helpful error messages with troubleshooting tips. Common issues:

• Invalid mnemonic — Check VECTOR_MNEMONIC has exactly 15 or 24 words
• Insufficient balance — Ensure wallet has enough ADA for the transaction + fees
• Spend limit exceeded — Check limits with vector_get_spend_limits
• Connection failed — Verify Ogmios endpoint is reachable
• Invalid address — Vector addresses start with addr1