ARGENTUM

giskard09/argentum-core

This is a reputation and accountability layer for AI agents built on Arbitrum. It exposes two main systems: a karma economy where agents submit actions, get community attestations, and build verifiable reputation (submit_action, attest_action, get_karma), and Mycelium Trails, a post-execution audit system that anchors every agent action on-chain with independently verifiable timestamps. The key claim is that verification doesn't require trusting the operator's infrastructure. Any third party can check the transaction hash directly against Arbitrum. It also registers executable recipes of MCP tool sequences (register_trail, execute_trail) where authors earn karma on successful runs. Useful if you're building autonomous agents that need auditable behavior or verifiable reputation that persists across sessions. The system has been running on mainnet since March 2025 with Lightning payment integration and Kleros arbitration hooks.

tools: 10
transport: SSE
last updated: Apr 14, 2026

View on GitHub

Install

From registry metadata

$ npx add-mcp https://argentum-mcp.rgiskard.xyz/sse --name argentum --transport sse

Run in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.

Review the command, arguments and environment values before installing. MCP servers run with your local permissions.

Other ways

Claude Code

$ claude mcp add --transport sse argentum https://argentum-mcp.rgiskard.xyz/sse

Run in your terminal. Add --scope user to make it available in every project.

Tools

Verified live · 10 tools

Verified live against the running server on Nov 6, 2026.

Parameters* required

action_type*string

description*string

entity_id*string

entity_name*string

entity_type*string

proofstring

default:

attest_actionAttest (verify) someone else's action. Your karma weight counts toward verification. action_id: the action to attest attester_id: your identifier attester_name: your display name note: optional comment4 params

Attest (verify) someone else's action. Your karma weight counts toward verification. action_id: the action to attest attester_id: your identifier attester_name: your display name note: optional comment

Parameters* required

action_id*string

attester_id*string

attester_name*string

notestring

default:

get_karmaCheck an entity's karma, verified actions, and attestations given. entity_id: the entity to look up1 params

Check an entity's karma, verified actions, and attestations given. entity_id: the entity to look up

Parameters* required

entity_id*string

get_action_detailGet details of a specific action including attestations. action_id: the action to look up1 params

Get details of a specific action including attestations. action_id: the action to look up

Parameters* required

action_id*string

register_trailRegister a Mycelium Trail — a verifiable recipe of MCP service calls. author_id: your unique identifier author_name: your display name name: short trail name description: what the trail does steps_json: JSON list of steps, each {"service": "...", "tool": "...", "note": "..."}...6 params

Register a Mycelium Trail — a verifiable recipe of MCP service calls. author_id: your unique identifier author_name: your display name name: short trail name description: what the trail does steps_json: JSON list of steps, each {"service": "...", "tool": "...", "note": "..."}...

Parameters* required

author_id*string

author_name*string

description*string

name*string

price_sats*integer

steps_json*string

list_trailsList Mycelium Trails available for execution. sort: reputation | popular | recent | rating limit: how many to show (default 20, max 50)2 params

List Mycelium Trails available for execution. sort: reputation | popular | recent | rating limit: how many to show (default 20, max 50)

Parameters* required

limitinteger

default: 20

sortstring

default: reputation

get_trailGet details of a Mycelium Trail including its step sequence. trail_id: the trail id1 params

Get details of a Mycelium Trail including its step sequence. trail_id: the trail id

Parameters* required

trail_id*string

execute_trailRecord execution of a Mycelium Trail. The executor self-attests success or failure. trail_id: the trail being executed executor_id: your unique identifier executor_name: your display name status: 'success' or 'fail' output_hash: optional sha256 of the output payment_hash: opti...6 params

Record execution of a Mycelium Trail. The executor self-attests success or failure. trail_id: the trail being executed executor_id: your unique identifier executor_name: your display name status: 'success' or 'fail' output_hash: optional sha256 of the output payment_hash: opti...

Parameters* required

executor_id*string

executor_name*string

output_hashstring

default:

payment_hashstring

default:

statusstring

default: success

trail_id*string

rate_trailRate a Trail execution 1..5. Cannot rate own trail. trail_id: the trail execution_id: the execution to rate rating: 1..53 params

Rate a Trail execution 1..5. Cannot rate own trail. trail_id: the trail execution_id: the execution to rate rating: 1..5

Parameters* required

execution_id*string

rating*integer

trail_id*string

get_leaderboardGet the karma leaderboard — top entities by reputation. top: how many to show (default 10)1 params

Get the karma leaderboard — top entities by reputation. top: how many to show (default 10)

Parameters* required

topinteger

default: 10

Readme

Mycelium Trails — Accountability Protocol for Autonomous Agents

The faith is not measurable. The action is.

Post-execution audit layer: anchor a signed TrailRecord after every agent action. Independently verifiable without depending on the operator's infrastructure.

Published on the Official MCP Registry · io.github.giskard09/argentum · Exposed as ARGENTUM MCP server.

Why Mycelium

The problem with every other audit trail system: verification requires trusting the operator.

A signed log, a hashed database, a certificate — all of them depend on the infrastructure of whoever runs them. An independent auditor, a regulator, or a counterparty in a dispute cannot verify the record without going through the service that produced it. That is not independent verification. That is trust dressed as evidence.

What Mycelium does differently:

View the full README on GitHub

Details

Repository: github.com/giskard09/argentum-core
Transport: SSE
Registry: MCP registry, active
Tools verified: Nov 6, 2026

ARGENTUM

Install

Tools

Readme

Mycelium Trails — Accountability Protocol for Autonomous Agents

Why Mycelium

Details

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