How do I install Vector (Apex Fusion)?

Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Vector (Apex Fusion) need an API key?

No required environment variable is listed on this record.

What transport does Vector (Apex Fusion) use?

Vector (Apex Fusion) is reached over HTTP.

When was Vector (Apex Fusion) last checked?

Last checked 2026-11-08. 24 keyless tools for AI agents on Vector, the Apex Fusion eUTXO L2: wallets, contracts, registry.

Vector (Apex Fusion) MCP server

Vector MCP Server

MCP (Model Context Protocol) server for Vector - the Apex Fusion eUTXO L2. Enables AI agents (Claude, GPT, Gemini, or any MCP client) to interact with Vector natively: query balances, send transactions, deploy and interact with smart contracts, manage on-chain agent identities, and submit protocol improvement proposals.

Built on Ogmios + Koios - no Blockfrost dependency.

Vector mainnet is live. Full guides: Vector AI documentation.

Hosted servers - no install

Hosted instances run on both networks. The 33 tools described below are the code of this release; each hosted instance serves them once the release deploys there (testnet automatically on push to main, mainnet on a deliberate cutover dispatch):

Network	Endpoint
Mainnet	`https://mcp.vector.mainnet.apexfusion.org/mcp`
Testnet	`https://mcp.vector.testnet.apexfusion.org/mcp`

Deployment status: both networks are current with the non-custodial migration, and only with that. Both hosted instances run the completed migration: testnet since the 2026-07-31 morning merges (auto-deployed from main), mainnet since a deliberate cutover deploy the same day (see docs/architecture/non-custodial-split.md, section 11, "Rollout", for the full history). This does not mean a hosted instance serves every tool listed below: the marketplace tools are newer than those deploys, and an instance serves them only once the release that adds them has deployed there (until then its tool list is shorter than the one below; a client's tool list shows what an instance serves right now). Both hosted instances are open access - no bearer token is required to connect. Callers are admitted anonymously with per-IP rate limiting. That is an access-control property, and it is separate from custody: neither instance accepts a mnemonic from any caller, with or without a token. Self-hosted deployments can still gate access with MCP_AUTH_TOKENS - see Configuration.

Transport: Streamable HTTP only, as of 2.0.0. The legacy SSE pair (/sse + /messages), deprecated by the MCP spec (2026-07-28 revision), was removed in this release - those paths now answer 404. Every client connects to /mcp, the endpoint the table above lists. This is a breaking change for SSE clients: reconnect with --transport http and the /mcp URL (below). The server also answers any-origin CORS (browser MCP clients are first-class callers) and exposes an unauthenticated GET /health liveness probe. This describes the code - each hosted instance serves it once this release deploys there (testnet automatically on push to main, mainnet on a deliberate cutover dispatch).

Connect from Claude Code in one command. No token needed for the hosted instances.

claude mcp add --transport http vector-mcp https://mcp.vector.mainnet.apexfusion.org/mcp

Swap in the testnet host to connect to testnet instead. Self-hosting (below) gives every caller open access to your own instance unless you set MCP_AUTH_TOKENS.

Security notice: the non-custodial migration is complete, in this codebase and on both hosted instances, as of the 2026-07-31 cutover deploy. No tool in this repository accepts a mnemonic, private key, or any other key material. Every build_* tool constructs an unsigned transaction from a wallet address only, and every signing operation happens locally on your own machine, through the local signer companion. Broadcast the signed result with vector_submit_transaction - your seed phrase never leaves your machine, and no server running this release ever holds one. This is enforced mechanically in the code, not just by convention: the builder's custody boundary test scans every source file for key-material vocabulary against an allowlist that is now empty and pinned at size zero, so a future change cannot silently reintroduce a mnemonic parameter without failing that test by name. This describes this release and the 2026-07-31 deploy specifically - a later deploy is a separate operational action, not automatically covered by this notice; see the deployment status note above and docs/architecture/non-custodial-split.md for the full rollout history.

Self-hosting instructions are below.

Local signer (non-custodial path)

packages/signer is a local MCP server that holds your key and signs transactions locally instead of handing your mnemonic to a shared host. It has no network access at all: stdio transport only, no Provider, no egress, so a key given to it never reaches a shared server or your model provider. Four tools: vector_signer_get_address, vector_signer_decode_transaction, vector_signer_sign, vector_signer_get_spend_limits.

In this codebase, this signer is the single signing point for every family the builder exposes. The full non-custodial flow is live in this release for all of them: vector_signer_get_address → build_* → vector_signer_sign → vector_submit_transaction → vector_await_transaction. No step in that chain puts a mnemonic in front of a server running this code, or your model provider, for any tool. The build → submit → await half is E2E-proven on Vector testnet across the wallet/tx, smart-contract, agent-registry, and self-improvement families, including the first keyless-built proposal submission the deployed self-improvement module validator has ever accepted; see packages/signer/README.md for exactly what that testing does and does not exercise on the signer's side. This describes the code, not every deployment of it - see the deployment status note above.

See packages/signer/README.md for configuration, tools, and known limitations.

Features

Wallet & queries - balances, UTxOs, and transaction history for any address (no key material)
Keyless transaction building - build unsigned AP3X/token/multi-output transactions and contract interactions; sign locally, broadcast via submit
Smart contracts - deploy Plutus/Aiken validators, lock and spend UTxOs at script addresses (keyless)
Agent registry - register, discover, update, transfer, and deregister on-chain AI agent identities via soulbound NFTs (keyless - build, sign locally, broadcast)
Agent messaging - send on-chain messages between agents via TX metadata (keyless)
Self-Improvement Module - browse, submit, critique, and endorse improvement proposals; the on-chain module is live on Vector mainnet, and every write tool is keyless in this codebase
Safety controls - per-identity rate limiting; spend limits for every family are enforced by the local signer, per user - the server holds no spend-limit state of its own
Streamable HTTP transport - the modern MCP transport at /mcp, with any-origin CORS for browser clients and an unauthenticated GET /health probe (the legacy SSE pair was removed in 2.0.0)

MCP Tools (33)

Wallet & Queries

Tool	Description
`vector_get_balance`	Get AP3X and token balances for any address
`vector_get_utxos`	List UTxOs for an address
`vector_get_transaction_history`	Get transaction history for an address

Transactions

Tool	Description
`vector_build_send_apex`	Build an unsigned AP3X transfer (keyless - sign with the local signer)
`vector_build_send_tokens`	Build an unsigned native-token transfer (keyless)
`vector_build_transaction`	Build an unsigned multi-output transaction (keyless, never submits)
`vector_dry_run`	Simulate a transaction without submitting - estimate fees and validate
`vector_submit_transaction`	Broadcast an already-signed transaction (for example one signed by the local signer)
`vector_await_transaction`	Wait for a submitted transaction to be confirmed on-chain

Smart Contracts

Tool	Description
`vector_build_deploy_contract`	Build an unsigned deployment of a Plutus V1/V2/V3 or Aiken validator (keyless)
`vector_build_interact_contract`	Build an unsigned lock or spend at a script address, with a redeemer (keyless)

Agent Registry

Tool	Description
`vector_build_register_agent`	Build an unsigned agent registration - mints a soulbound identity NFT and locks a 10 AP3X deposit (keyless)
`vector_discover_agents`	Discover registered agents, filter by capability or framework (no wallet needed)
`vector_get_agent_profile`	Get an agent's full profile by DID (no wallet needed)
`vector_build_update_agent`	Build an unsigned update to an agent's name, description, capabilities, framework, or endpoint (keyless)
`vector_build_transfer_agent`	Build an unsigned transfer of agent ownership to a new address (keyless)
`vector_build_deregister_agent`	Build an unsigned deregistration - burns the identity NFT and returns the 10 AP3X deposit (keyless)
`vector_build_message_agent`	Build an unsigned on-chain message to an agent via TX metadata (label 674) (keyless)

Self-Improvement Module

Tool	Description
`vector_self_improvement_browse`	Browse improvement proposals, critiques, and endorsements
`vector_self_improvement_analyze_metrics`	Proposal metrics: activity, adoption rate, treasury health, engagement
`vector_build_self_improvement_proposal_lock`	Build an unsigned proposal-stake lock (step 1 of 2, keyless)
`vector_build_self_improvement_proposal_spend`	Build an unsigned proposal submission - spends the lock and mints the proposal and activity tokens (step 2 of 2, keyless). Two transactions, agent-orchestrated.
`vector_build_self_improvement_critique`	Build an unsigned critique on a proposal - support, oppose, or propose amendments (keyless)
`vector_build_self_improvement_endorse`	Build an unsigned endorsement of a proposal by staking AP3X (keyless)

Marketplace (9)

Tool	Description
`vector_marketplace_list_capabilities`	List the capability ids advertised on the agents marketplace, with supplier counts (read-only, no wallet needed)
`vector_marketplace_list_suppliers`	List supplier adverts: advert ref, model, price, bonds, processing window, status. Filter by capability; free suppliers by default; fleet adverts are marked "not hireable through these tools (fleet route)", since `vector_build_marketplace_post_escrow` refuses them (read-only, no wallet needed)
`vector_marketplace_get_supplier`	Read one advert from the ledger by advert ref (all 13 fields) plus the indexer's live status, and the manifest its Detail URI points to (fetched from the supplier's host and shown as the supplier's own JSON, with the sha256 of its bytes held against the advert's detail hash and reported as a match or a mismatch); refuses UTxOs that are not at the advert script address or hold no advert datum (read-only, no wallet needed)
`vector_build_marketplace_post_escrow`	Build an unsigned escrow post that hires a supplier: locks price + supplier bond + buyer bond for an advert and commits a hash of your payload (its JSON block echoes the payload verbatim; the transaction is valid for at most 180 s). Template-contract suppliers only: a fleet advert is refused, since `vector_marketplace_send_job` could not deliver its job (keyless - sign with the local signer)
`vector_build_marketplace_accept`	Build an unsigned accept of a Submitted job, within 600 s of the supplier's Submit: pays the supplier price + supplier bond and returns your buyer bond (keyless)
`vector_build_marketplace_reclaim`	Build an unsigned reclaim of an Open or Claimed escrow once deliver_by has passed: everything returns to you (keyless)
`vector_marketplace_send_job`	Send your payload to the supplier of a posted escrow and get a job id. Template-contract suppliers only; the wallet must have posted and funded the escrow; the whole call, its checks included, waits up to 90 s for the supplier to answer (nothing is sent if the checks leave it less than the 60 s a supplier may need)
`vector_marketplace_get_job`	Poll a job: pending, failed, or done with the result and the supplier's signed receipt. Template-contract suppliers only; works after the escrow is accepted or released; waits up to 20 s

Agent DIDs follow the format: did:vector:agent:{policyId}:{nftAssetName}

Example non-custodial flow for a registry op: vector_build_register_agent → vector_signer_sign → vector_submit_transaction → vector_await_transaction.

Self-hosting

1. Install and build

Requires Node.js >= 22 (matches engines in every package.json and the Dockerfile's node:22-alpine base).

npm install
npm run build

Dependency advisories. npm audit currently reports 1 low-severity advisory: an esbuild arbitrary-file-read issue that only triggers via its own Windows dev server, reachable solely through tsup (a build-time-only dependency, absent from the production image, which installs with npm ci --omit=dev). As of 2026-07-31 this tree carried 44 advisories, including 1 critical (tar, GHSA-23hp-3jrh-7fpw) that arrived because @cardano-sdk/crypto - pulled in transitively through @lucid-evolution/lucid - declared the entire npm CLI package as a runtime dependency. That dependency was dead weight: @cardano-sdk/crypto's own published code never requires npm, and neither npm nor tar appears anywhere in this server's built bundle. Regenerating the lockfile picked up a newer @cardano-sdk/crypto release that dropped the stray dependency outright, clearing all 43 of those advisories without any override needed; package.json also carries a defensive overrides pin on tar and brace-expansion against future regressions, though it is not what resolved this one.

2. Configure environment (optional)

cp .env.example .env
# Edit .env with your endpoint URLs (defaults point to Vector testnet; mainnet URLs below)

Every build_* tool is keyless: it takes a wallet address, never a mnemonic. No tool call against this server ever needs a mnemonic parameter, for any family - see the security notice above.

3. Run

npm start
# Server listens on port 3000 (configurable via PORT env var)

Connect:

claude mcp add --transport http vector-mcp http://localhost:3000/mcp

Add --header "Authorization: Bearer <your-token>" if you set MCP_AUTH_TOKENS. A liveness probe is at GET /health - unauthenticated, returns {"status":"ok","version":"<version>"}.

If this instance will be reachable by anyone but you, set MCP_AUTH_TOKENS first - see Configuration below.

4. Add to Claude Desktop

Add to your Claude Desktop MCP config (claude_desktop_config.json):

{
  "mcpServers": {
    "vector": {
      "command": "node",
      "args": ["/path/to/vector-mcp-server/packages/builder/build/index.js"],
      "env": {
        "VECTOR_OGMIOS_URL": "https://ogmios.vector.testnet.apexfusion.org",
        "VECTOR_SUBMIT_URL": "https://submit.vector.testnet.apexfusion.org/api/submit/tx",
        "VECTOR_KOIOS_URL": "https://koios.vector.testnet.apexfusion.org/",
        "VECTOR_EXPLORER_URL": "https://vector.testnet.apexscan.org"
      }
    }
  }
}

For mainnet, use the mainnet endpoint table below. (No local setup needed if you use the hosted servers above.)

Docker

npm run build
docker build -t vector-mcp .
docker run -p 3000:3000 vector-mcp

If this instance will be reachable by anyone but you, set MCP_AUTH_TOKENS first - see Configuration below (docker-compose.yml in this repo binds 127.0.0.1 by default; the command above does not).

Configuration

Variable	Description	Default
`PORT`	HTTP server port	`3000`
`VECTOR_OGMIOS_URL`	Ogmios HTTP JSON-RPC endpoint	`https://ogmios.vector.testnet.apexfusion.org`
`VECTOR_KOIOS_URL`	Koios REST API endpoint	`https://v2.koios.vector.testnet.apexfusion.org/`
`VECTOR_SUBMIT_URL`	Transaction submit API	`https://submit.vector.testnet.apexfusion.org/api/submit/tx`
`VECTOR_EXPLORER_URL`	Block explorer base URL	`https://vector.testnet.apexscan.org`
`VECTOR_MARKETPLACE_INDEXER_URL`	Marketplace indexer behind the `vector_marketplace_*` tools. Read at startup, before any `.env` file is loaded, so it must be set as a real environment variable. Trailing slashes are ignored. A testnet-configured instance reads the mainnet indexer with testnet Koios, so either set this variable there or treat the marketplace tools as mainnet-only	`https://mp-indexer.vector.apexfusion.org`
`VECTOR_RATE_LIMIT_PER_MINUTE`	Max tool calls per minute, per identity (min `1`)	`60`
`VECTOR_MCP_SESSION_IDLE_MS`	`/mcp` session idle timeout before the reaper closes it, in ms (min `100`)	`600000` (10 min)
`VECTOR_MCP_SESSION_SWEEP_MS`	How often the `/mcp` idle reaper sweeps, in ms (min `100`)	`60000` (1 min)
`VECTOR_MCP_MAX_SESSIONS_PER_IDENTITY`	Max concurrent `/mcp` sessions per identity before the oldest is evicted (min `1`)	`32`
`MCP_AUTH_TOKENS`	Bearer tokens that may call this server. Comma-separated; each entry is `label:token` or a bare token. When unset, the server is open to anyone who can reach it.

The four numeric knobs above fail loudly at startup on a malformed value: anything that is not a plain integer, or is below its listed minimum, raises a startup error naming the variable and the value it got, rather than silently falling back to some other behavior (an unparseable rate limit silently disabling rate limiting, for example).

This server has no spend-limit or audit-log configuration of its own: it holds no key material for any family, so it has nothing left to limit. Every spend limit, and the audit log recording it, lives in your local signer instead - see VECTOR_SIGNER_SPEND_LIMIT_PER_TX / VECTOR_SIGNER_SPEND_LIMIT_DAILY / VECTOR_SIGNER_AUDIT_LOG_PATH in packages/signer/README.md.

Running a public instance? Set MCP_AUTH_TOKENS to gate access to known callers, each with its own rate-limit budget. Note that the server answers any-origin CORS by design: with auth unset, any web page a browser user visits can drive your instance from JavaScript, sharing that user's per-IP rate-limit bucket - one more reason a public instance should set MCP_AUTH_TOKENS. With MCP_AUTH_TOKENS unset, callers are admitted anonymously with per-client-IP rate limits; the deployment's reverse proxy supplies the client address via the rightmost X-Forwarded-For entry. Tracked identities are capped (LRU); eviction resets a bucket's budget - a memory bound, not a security boundary, since an attacker rotating enough source IPs can still defeat per-IP limiting at a tier only the reverse proxy or network layer can police. /mcp sessions get the same per-identity treatment: idle sessions are reaped (VECTOR_MCP_SESSION_IDLE_MS, swept every VECTOR_MCP_SESSION_SWEEP_MS), and concurrent sessions per identity are capped (VECTOR_MCP_MAX_SESSIONS_PER_IDENTITY) - see the Configuration table above for defaults and minimums.

Malformed values fail loudly. The server refuses to start if MCP_AUTH_TOKENS contains an empty token, a token with embedded whitespace, a duplicate token, or a value where every comma-separated entry is blank (e.g. a stray ,,,). Each case raises a startup error that names the problem but never echoes a token value. Commas delimit entries and cannot be escaped, so generate tokens from a comma-free charset (hex / base64url / alphanumeric).

Error responses do not echo configured endpoints. This covers every failure mode a network call can produce, not just an HTTP-level rejection: a DNS failure, a dropped connection, and a malformed (non-JSON) response body are all sanitised the same way an ordinary 4xx/5xx status is - the underlying HTTP client is the platform's native fetch, chosen in part because its own errors do not embed the request URL the way some polyfills do. A failed Ogmios or Koios query is this server's own infrastructure problem, not something the caller can act on - it is reported by service name and status only, for example "Ogmios request failed (queryLedgerState/utxo): 503 Service Unavailable" or, for a connection failure, "...: network error". A rejected transaction submission is different: the ledger's verdict on the CALLER'S OWN transaction (a bad input, an unmet script condition, a fee too small) stays in the response, since it is the feedback loop an agent needs to self-correct after build → sign → submit - only URL-shaped content is scrubbed out of it first, for example "Transaction submission rejected (400 Bad Request): ValueNotConservedUTxO...". A NETWORK failure to even reach the submit API is reported as an infrastructure failure instead ("...: network error"), never worded as a ledger rejection, since nothing looked at the transaction at all. Neither case ever echoes the configured VECTOR_OGMIOS_URL / VECTOR_KOIOS_URL / VECTOR_SUBMIT_URL value itself, and full unscrubbed detail always goes to the server's own console.error log for operators. Known limit: the submission-rejection scrub removes http(s) URLs and the three endpoints above by name - a rejection body that happens to name some other internal hostname passes through unscrubbed, bounded by a 2000-character cap.

Mainnet endpoints

Variable	Mainnet value
`VECTOR_OGMIOS_URL`	`https://ogmios.vector.mainnet.apexfusion.org`
`VECTOR_SUBMIT_URL`	`https://submit.vector.mainnet.apexfusion.org/api/submit/tx`
`VECTOR_KOIOS_URL`	`https://v2.koios.vector.mainnet.apexfusion.org/`
`VECTOR_EXPLORER_URL`	`https://vector.apexscan.org/en/`

Testing

npm run test:unit

No wallet, no network - pure logic only (CBOR encode/decode assertions).

npm run test:smoke

Builds the server, boots it, and asserts the exposed tool inventory matches the checked-in snapshot. No wallet, no external network. CI runs this and test:unit on every PR.

echo "your mnemonic words here" > packages/builder/mnemonic.txt
npm run test:integration

Requires mnemonic.txt in packages/builder/ containing a funded Vector testnet mnemonic. Covers the core tools end-to-end against Vector testnet, including the full agent lifecycle: register, discover, profile, update, transfer, message, and deregister (all keyless now: build → sign → submit → await per step). Also runs keyless-build.test.ts, registry-keyless.test.ts, and self-improvement-keyless.test.ts - tier-1 suites needing no mnemonic at all, each building unsigned transactions against live public data only (vector_build_send_tokens is covered offline, by unit tests and the legacy suite above; self-improvement-keyless.test.ts covers critique, endorse, and proposal-lock builds, plus a not-found rejection path on proposal-spend). Set VECTOR_E2E_SUBMIT=1 to additionally run each family's gated end-to-end suite, fully on-chain: keyless-e2e.test.ts lands one real self-send (~0.16 AP3X fee); registry-e2e.test.ts runs a full register → update → deregister agent lifecycle (the 10 AP3X deposit round-tripped exactly, fees only as net cost); self-improvement-e2e.test.ts locks and spends a real improvement proposal through the deployed module validator, then critiques and endorses it (≈48 AP3X in stakes and module minimums, plus six transaction fees, one-way - the stakes are locked by the module's own design, not lost). Set LEGACY_FULL=1 to additionally exercise the same self-improvement lock → spend sequence inside run.test.ts itself (off by default, since self-improvement-e2e.test.ts already proves that exact path). Never runs in CI.

npm run test:smoke:signer

Builds the local signer (packages/signer), boots it over stdio, and exercises all four of its tools, including the fail-closed audit-write-failure path. No wallet, no network. CI runs this on every PR alongside the two smoke tests above.

export VECTOR_SIGNER_MNEMONIC_FILE=/absolute/path/to/testnet-mnemonic.txt
npm run test:integration:signer

Requires a funded Vector testnet wallet. Builds a real unsigned transaction the way the hosted builder does (no key), then has the local signer decode, policy-check, and sign it against live chain data. Never submits. Never runs in CI. See packages/signer/README.md.

Architecture

┌──────────────────────┐             ┌──────────────────────────┐
│  Claude / GPT / etc. │◄───────────►│  vector-mcp-server       │
│  (any MCP client)    │    /mcp     │                          │
└──────────────────────┘             │  ┌────────────────────┐  │
                                     │  │ Rate Limiter        │  │
                                     │  │ (60 calls/min)      │  │
                                     │  └────────┬───────────┘  │
                                     │           │               │
                                     │  ┌────────▼───────────┐  │
                                     │  │ Lucid + Ogmios     │  │
                                     │  │ Provider            │  │
                                     │  └────────┬───────────┘  │
                                     │           │               │
                                     │  ┌────────▼───────────┐  │
                                     │  │ Ogmios / Koios /   │  │
                                     │  │ Submit API          │  │
                                     │  └────────────────────┘  │
                                     └──────────────────────────┘

No safety layer sits between the rate limiter and the provider: this server holds no key material for any family, so it has no spend limits of its own left to enforce. Every spend limit lives in your local signer instead.

About Vector

Vector is Apex Fusion's eUTXO L2, running Cardano mainnet parameters (Conway era, Plutus V3). Sub-1-second optimistic finality and deterministic fees make it a natural chain for AI agent workloads. Mainnet is live.

Docs: https://apex-fusion.github.io/vector-ai-documentation/
Explorer (mainnet): https://vector.apexscan.org/en/
Explorer (testnet): https://vector.testnet.apexscan.org
Apex Fusion: https://apexfusion.org

Vector (Apex Fusion)

Add this server

Host a copy with our keys and logs.

Server facts

Tools

Questions