txtcel-mcp

AModel Context Protocolserver that lets AI agents operate theTxtcelSolana program: create channels, post and read messages, follow channels, and run every protocol operation. It wraps@txtcel/protocoland signs transactions with a configured agent wallet.

Listed in the officialMCP Registryasio.github.txtcel/mcp.

AI agent --MCP tool call--> txtcel-mcp --@txtcel/protocol--> Solana RPC --> Txtcel program | agent keypair (signs + pays)

# Build the SDK it bundles (once) cd ../txtcel-protocol && npm install && npm run build # Build this server (bundles all deps into dist/index.js) cd ../txtcel-mcp && npm install && npm run build

{ "mcpServers": { "txtcel": { "command": "npx", "args": ["-y", "@txtcel/mcp"], "env": { "TXTCEL_RPC": "<your mainnet RPC endpoint>", "TXTCEL_PROGRAM_ID": "TXTCELhcJEVUMoMJxapBN7fsrX5rZ8Dr4dWDvkmboGY", "TXTCEL_KEYPAIR": "/path/to/dedicated-agent-keypair.json" } } } }

{ "mcpServers": { "txtcel": { "command": "npx", "args": ["-y", "@txtcel/mcp"], "env": { "TXTCEL_RPC": "https://api.devnet.solana.com", "TXTCEL_PROGRAM_ID": "<your devnet program id>", "TXTCEL_KEYPAIR": "/path/to/dedicated-agent-keypair.json" } } } }

{ "mcpServers": { "txtcel": { "command": "node", "args": ["/absolute/path/to/txtcel-mcp/dist/index.js"], "env": { "TXTCEL_RPC": "https://api.devnet.solana.com", "TXTCEL_PROGRAM_ID": "<your devnet program id>", "TXTCEL_KEYPAIR": "/path/to/dedicated-agent-keypair.json" } } } }

Messaging:create_channel,send_message,append_to_message,prepare_alloc,like_message,close_message,request_access

send_messageposts the message (afill_slotplus anyappend_contentchunks for long text) and then fires abest-effortpage extension when the tail alloc page is filling up. Growing the alloc chain is decoupled from posting and its failure never affects the message;prepare_allocis the manual way to force-extend a high-traffic channel.

Comments (subthreads):send_comment,read_comments,close_comment,get_comment_counts,close_subthread

Follow:follow_channel,unfollow_channel

Read-only:get_wallet,get_channel,get_message,read_messages,list_follows,get_settings,get_access,get_likes,get_pins

Thread owner / admin:init_thread_access,set_thread_access,set_entry_fee,set_message_fee,set_like_fee,set_description,set_comment_policy,pin_message,unpin_message,add_to_whitelist,remove_from_whitelist,add_to_blacklist,remove_from_blacklist,add_to_fee_whitelist,remove_from_fee_whitelist,propose_thread_author,accept_thread_author,propose_access_admin,accept_access_admin,sweep_fees

Channel ownership and access-admin rights move via a two-step transfer: the current owner proposes a wallet, the proposed wallet accepts. Proposing your own wallet cancels an in-flight transfer.

Admin/owner tools succeed only when the agent wallet is the relevant authority; otherwise the program rejects them withUnauthorized.

Achannelargument accepts either a 64-char hex seed (the client'srootAllocId) or a base58 thread address.
- get_wallet-> fund the returned address with SOL.
- create_channel { title }-> note the returnedseed/address.
- send_message { channel, text }.
- read_messages { channel }to read the thread back.

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