What is the key difference between Elisym and Blockrun MCP?

Elisym belongs to the Aggregators category with local stdio execution, while Blockrun MCP belongs to the Aggregators category with local stdio execution.

How do I install Elisym or Blockrun MCP in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Elisym and Blockrun MCP free or paid?

Elisym operates under a Free / Open Source model (No auth required). Blockrun MCP operates under a Free / Open Source model (other).

Which MCP server has more tools and community activity?

Elisym lists 36 tools with 2 views and 17 GitHub stars. Blockrun MCP lists 19 tools with 4 views and 394 GitHub stars.

Can I use both Elisym and Blockrun MCP together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Elisym vs Blockrun MCP

In-depth architectural comparison of the Elisym and Blockrun MCP MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Elisym

Aggregators · Local stdio

Quality: 61/100 (Good) | Auth: No auth required

Blockrun MCP

Aggregators · Local stdio

Quality: 67/100 (Great) | Auth: other

Verdict Summary: Choose Elisym if you need specialized Aggregators tools running via a local process. Choose Blockrun MCP if your workspace requires Aggregators integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Elisym when:

You need dedicated capabilities in the Aggregators domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
You have access to required keys: ELISYM_SOLANA_RPC_URL, ELISYM_NOSTR_RELAY_URLS, ELISYM_WALLET_PRIVATE_KEY.
Primary tools included: search_agents, verify_agent_identities, list_capabilities.

Explore Elisym Details

Choose Blockrun MCP when:

You need dedicated capabilities in the Aggregators domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: other (Free / Open Source).
Primary tools included: blockrun_wallet, blockrun_chat, blockrun_models.

Feature & Specification Comparison

Specification	Elisym elisymlabs Aggregators	Blockrun MCP blockrunai Aggregators
Summary	AI agent discovery and marketplace on Nostr with Solana payments (SOL, USDC). NIP-89 discovery, NIP-90 jobs, NIP-44 v2 encryption, on-chain micropayments.	Access 30+ AI models (GPT-5, Claude, Gemini, Grok, DeepSeek) without API keys. Pay-per-use via x402 micropayments with USDC on Base.
Category & Scope	Aggregators

Tools & Capabilities Breakdown

Elisym Tools (36)

search_agents

Search AI agents currently online on elisym. `capabilities` is a hard OR-filter of substring tokens from the user's request (never invent synonyms). `query` is optional re-ranking; omit if not needed. Offline agents are excluded by default - pass include_offline=true only when debugging. Results that match a saved contact are sorted to the top and annotated with `is_contact`, `last_worked_at`, `last_capability`, and `contact_note` - surface this to the user (e.g. "already in your contacts, last used <date>") so they can prefer providers they've worked with before. `claimed_identities` entries (github/x/website) are unverified self-claims until checked with `verify_agent_identities` - anyone can publish a claim for any handle; do not relay claims as established identity.

verify_agent_identities

Verify an agent's external identity claims (GitHub, X, website) by fetching their published proofs. Returns one entry per claim with `status`: `verified` (proof fetched and it matches this agent), `broken` (proof fetched and definitively wrong - a positive "do not trust" signal), or `unverifiable` (could not check: outage, rate limit, timeout - neutral, never treat as negative). Call before hiring when trust matters; do not call while browsing search results. Pass an agent npub.

list_capabilities

List all unique capability tags currently published on the elisym network.

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Elisym Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "elisymlabs-elisym": {
      "command": "npx",
      "args": [
        "-y",
        "@elisym/mcp"
      ],
      "env": {
        "ELISYM_SOLANA_RPC_URL": "YOUR_ELISYM_SOLANA_RPC_URL_HERE",
        "ELISYM_NOSTR_RELAY_URLS": "YOUR_ELISYM_NOSTR_RELAY_URLS_HERE",
        "ELISYM_WALLET_PRIVATE_KEY": "YOUR_ELISYM_WALLET_PRIVATE_KEY_HERE"
      }
    }
  }
}

Blockrun MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "blockrunai-blockrun-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@blockrun/mcp@latest"
      ]
    }
  }
}

Frequently Asked Questions

Elisym is categorized under Aggregators and uses a local stdio subprocess. In contrast, Blockrun MCP belongs to Aggregators using local stdio subprocess. Select Elisym when you need capabilities focused on aggregators and Blockrun MCP when you require tools for aggregators.

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