sailorpepe/litvm-tcg-oracle-mcp

The first Model Context Protocol server for the LitecoinVM (LitVM) ecosystem.

Plug any AI agent into 455K+ real trading card prices across 25+ games — every price backed by on-chain Merkle proofs, not blind trust.

       

🔌 Connect over MCP — one URL, no install

https://litvm.the-undesirables.com/mcp

No install, no account, no API key. 13 tools over streamable HTTP — all free. The full oracle through the LitVM lens: prices, on-chain Merkle proofs (raw AND graded slabs), calibrated forecasts with a public accuracy scorecard, card-collateral loan-terms previews, sports boards, the slab census, and the 4,444-soul fantasy league whose weekly lineups are committed to the PredictionRegistry on LiteForge before games score. Paid endpoints (full loan quotes, per-player sports forecasts) live on the flagship oracle at https://mcp.the-undesirables.com via x402.

Claude Desktop / Perplexity — add it as a custom remote connector (Perplexity: Settings → Connectors → + Custom Connector → Remote).

Cursor / Windsurf / VS Code — clients that take a URL in config:

{
  "mcpServers": {
    "tcg-oracle": { "url": "https://mcp.the-undesirables.com" }
  }
}

Tools: search_tcg_products, market_snapshot, grade_card, grade_or_not, simulate_price, card_forecast, trending_cards, optimize_portfolio, recommend_workflow, check_accuracy.

Search is set-aware — search_tcg_products("Base Set Charizard") separates Base Set, Base Set 2, and Shadowless rather than returning every Charizard printing. Every result carries a set field and a product_id you can pass straight to the other tools.

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📑 Table of Contents

• Connect over MCP
• Why This Exists
• Data Coverage
• Quick Start
• Tools
  • search_cards
  • get_price
  • get_merkle_proof
  • oracle_status
  • get_forecast
  • simulate_price
  • get_market_snapshot
• Architecture
• Configuration
• On-Chain Contracts
• License & Commercial Use
• Links

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Why This Exists

AI agents are making decisions with market data — but how do they know the data is real?

Regular APIs require trust. You call an endpoint, you get a number, and you hope it's accurate. There's no way to verify it. For AI agents managing portfolios, executing trades, or assessing collateral, this is a problem.

This MCP server solves it. Every actively-priced product in the oracle is committed to a Merkle root on-chain hourly. Any agent can request a Merkle proof for any card and independently verify the price against the LitVM LiteForge blockchain — no trust required.

What Makes This Different

Feature	Regular Price API	LitVM TCG Oracle
Data source	Opaque server	13.5M+ verified market observations
Verification	Trust the server	Merkle proof → on-chain verification
Forecasting	None	Calibrated conformal risk forecast — honest VaR
Coverage	Limited	455K products, 290K actively priced
For AI agents	Manual integration	MCP — works in Claude, GPT, Cursor
Blockchain	None	LitVM LiteForge

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Data Coverage

The oracle indexes the full TCGPlayer catalog and tracks live market prices:

Metric	Count	Description
Total catalog	446,694	All products across 25+ games and 85 categories
Actively priced	276,788	Products with a current market_price > 0
Price observations	13.5M+	Daily snapshots collected over months
Merkle-provable	276,788	Only actively-priced products are committed on-chain
Zero-price entries	~157K	Tokens, promos, bundles, foreign-market-only — searchable but not provable

Transparency note: Not every product in the catalog has a market price. ~157K entries are catalog metadata with no trading activity (token cards, unopened case listings, foreign-language promos, etc.). These are returned by search_cards but will return a 404 from get_merkle_proof because zero-price products are not committed to the Merkle tree. This is by design — you wouldn't commit unverifiable data on-chain.

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Quick Start

Install

pip install litvm-tcg-oracle

For live on-chain contract reads (optional):

pip install litvm-tcg-oracle[chain]

Claude Desktop

Add to ~/.claude/claude_desktop_config.json:

{
  "mcpServers": {
    "litvm-tcg-oracle": {
      "command": "litvm-tcg-oracle"
    }
  }
}

Cursor / VS Code

Add to your MCP settings:

{
  "litvm-tcg-oracle": {
    "command": "litvm-tcg-oracle"
  }
}

Then ask your AI: "Search for Charizard Base Set and simulate the price over 90 days"

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Tools

13 tools — seven core (below) plus six ecosystem tools added in v1.1.0: get_graded_proof (GradedPriceOracle slab proofs on Chain 4441), get_fantasy_league (souls' lineups, merkle-locked on LiteForge weekly), get_oracle_scorecard (the public 30-day coverage record — verify before trusting), get_loan_terms_preview (six-step max-LTV derivation for card collateral), get_sports_board (daily movers over on-chain-committed stat panels), and get_census_summary (cert-verified circulating slab supply).

1. search_cards — Full-Text Search

Search the full 455K product catalog using FTS5 full-text search.

→ search_cards(query="black lotus", game="Magic", limit=5)

Covers 25+ games including: Pokémon, Magic: The Gathering, Yu-Gi-Oh!, One Piece, Disney Lorcana, Flesh & Blood, Dragon Ball Super, Digimon, Star Wars, Union Arena, MetaZoo, Cardfight Vanguard, My Hero Academia.

Returns product IDs needed for get_price and get_merkle_proof.

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2. get_price — Price + History

Get current market price and daily price history for any card.

→ get_price(card_name="Charizard Base Set Holo", days=90)

Returns market price, low (buy-it-now) price, and a daily price array. This history is what powers the risk-forecast calibration — the same data the forecast engine uses to calculate drift, volatility, and conformal bands.

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3. get_merkle_proof — On-Chain Verification

This is the key differentiator. Get a cryptographic proof that a card's price was committed to the LitVM LiteForge blockchain.

→ get_merkle_proof(product_id=84198)

Returns a bytes32[] proof array (19 hashes for the current tree) that can be submitted to the MerklePriceOracle contract on LitVM LiteForge to verify the price without trusting any server.

Verification flow:

1. Call get_merkle_proof(product_id) → receive proof + leaf data
2. Submit to MerklePriceOracle.verifyPrice() on LitVM LiteForge
3. Contract checks the leaf against the committed Merkle root
4. Returns true if and only if the price matches exactly

Leaf encoding (matches Solidity):

keccak256(bytes.concat(keccak256(abi.encode(
  productId, categoryId, name, marketPrice, lowPrice
))))

Standard: OpenZeppelin MerkleProof (double-hash, sorted pairs)

Only the ~290K actively-priced products are in the Merkle tree. Zero-price catalog entries return a 404 — this is correct behavior.

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4. oracle_status — Live On-Chain Status

Reads directly from the LitVM LiteForge blockchain via Caldera RPC — not cached data.

→ oracle_status()

Returns:

• MerklePriceOracle: Merkle root, total products, freshness, total root updates
• TCGPriceOracleV2: Total TWAP updates, last update timestamp, 660+ confirmed updates
• Database: Card count, price rows, latest data date

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5. get_forecast — Conformal Risk Forecast

The recommended, honest default forecast. Distribution-free, deterministic, never-under-protective — calibrated on real cross-card price history, no distributional assumption.

→ get_forecast(card_name="Charizard Base Set Holo")

Returns the agent-complete forecast: price, as_of, regime, point estimate, expected 30-day move, prob_up, 50%/90% bands, VaR 95/99, a Safe-Hold grade (downside / capital preservation), a Momentum grade (direction — or "NA" on a recent drift spike), and a one-line plain_english read.

Why conformal? Honest VaR: out-of-sample, a "5% VaR" means a ~5% loss happens about 5% of the time. No Monte Carlo, fully deterministic, anyone can reproduce it. Calls the free /api/v1/forecast/{product_id} endpoint.

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6. simulate_price — Monte Carlo Simulation

An opt-in stochastic view — Monte Carlo price paths (Merton/GBM) calibrated from real market data. Use get_forecast for the honest default.

→ simulate_price(card_name="Charizard Base Set", days=30, model="merton")

How the Simulation Works

This is not placeholder math. Every simulation parameter is calibrated from real price observations stored in the oracle database.

Calibration Pipeline:

Card name → FTS5 search → product_id → price_history (up to 365 days)
  → weekly resampling (ISO week buckets)
  → log-returns between weekly closing prices
  → annualized drift (μ) and volatility (σ)
  → jump detection via 2σ threshold on time-scaled returns
  → 10,000 vectorized numpy simulation paths
  → percentile forecast bands + VaR/CVaR risk metrics

Why weekly resampling? Daily TCG prices have irregular gaps (weekends, holidays, no sales). Weekly resampling produces stable drift estimates by collapsing daily observations into ISO-week buckets and computing log-returns between weekly closing prices. This eliminates the √Δt scaling problem that plagues irregularly-spaced data.

Models (pass via model=, default merton):

For the calibrated conformal forecast (honest VaR + Safe-Hold/Momentum grades), use get_forecast above. The two models below are the stochastic Monte Carlo alternatives.

Geometric Brownian Motion (GBM)

dS = μ·S·dt + σ·S·dW

Standard log-normal diffusion — the foundation of Black-Scholes option pricing. Assumes continuous price movements with no sudden jumps.

Merton Jump-Diffusion (default)

dS = (μ − λk)·S·dt + σ·S·dW + J·S·dN

Extends GBM by adding Poisson-distributed price jumps to capture sudden market events — buyouts, influencer videos, ban lists, set reprints, tournament results.

Symbol	Meaning	Calibration
μ	Drift (annualized return)	Weekly log-return mean × 52
σ	Volatility	Weekly log-return stdev × √52
λ	Jump intensity (jumps/year)	Count of returns > 2σ, annualized
μⱼ	Jump mean	Average of detected jump returns
σⱼ	Jump volatility	Stdev of detected jump returns
k	Drift compensator	E[eᴶ] - 1 (ensures fair pricing)
dW	Brownian motion	Standard Wiener process
dN	Jump arrival	Poisson(λ·dt)

Risk Metrics:

• VaR 95%: "There is a 5% chance the price drops below $X over N days"
• CVaR 95% (Expected Shortfall): "If that tail event occurs, the average loss lands at $Y"

Transparency:

• param_source: "calibrated_from_market_data" — real parameters from this card's history
• param_source: "default_tcg_priors" — insufficient data (<5 points), using conservative priors (3% drift, 40% vol)
• Standard errors reported for μ, σ, λ to quantify parameter uncertainty
• Mean-reversion detection via lag-1 autocorrelation

References:

• Merton, R.C. (1976). Option pricing when underlying stock returns are discontinuous. Journal of Financial Economics, 3(1-2), 125-144.
• Black, F. & Scholes, M. (1973). The Pricing of Options and Corporate Liabilities. Journal of Political Economy, 81(3), 637-654.

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6. get_market_snapshot — Market Overview

Top cards by value for any game.

→ get_market_snapshot(game="Pokemon", limit=25)

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Architecture

┌──────────────────┐       MCP (stdio)       ┌──────────────────────┐
│                  │ ◄─────────────────────► │                      │
│    AI Agent      │                          │  litvm-tcg-oracle    │
│  (Claude, GPT,   │                          │  MCP Server          │
│   Cursor, etc.)  │                          │  (pip install)       │
│                  │                          │                      │
└──────────────────┘                          └──────┬───────┬───────┘
                                                     │       │
                                          HTTPS      │       │  RPC
                                                     │       │
                                                     ▼       ▼
                                     ┌──────────────────┐  ┌─────────────┐
                                     │  Oracle REST API │  │  LitVM LiteForge  │
                                     │  (Mac Mini)      │  │  LitVM LiteForge │
                                     │                  │  │             │
                                     │  455K products   │  │  Merkle +   │
                                     │  13.5M prices    │  │  V2 Oracle  │
                                     │  FTS5 search     │  │  contracts  │
                                     └──────────────────┘  └─────────────┘

Off-chain layer (REST API): Search, prices, market data, simulation calibration
On-chain layer (LitVM LiteForge RPC): Merkle root verification, oracle contract status, TWAP feeds

The Mac Mini runs the daily pipeline (scrape → price update → Merkle root → on-chain push) and serves the REST API. The MCP server is a thin client that any developer can pip install and connect to Claude, GPT, or Cursor.

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Configuration

Variable	Default	Description
LITVM_ORACLE_URL	https://oracle.the-undesirables.com	Override the API base URL

Local Development

export LITVM_ORACLE_URL=http://localhost:8402
litvm-tcg-oracle

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On-Chain Contracts

Contract	Address	Purpose
MerklePriceOracle	0x96B124...170Cd	Hourly Merkle root for 290K products
TCGPriceOracleV2	0x697bF6...720E	Hourly TWAP for top 50 blue-chip cards

Both contracts are deployed on LitVM LiteForge testnet (Chain ID 4441) via the Caldera RPC.

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📝 License & Commercial Use

This project is licensed under the Business Source License 1.1 (BUSL-1.1).

We build in public and support the developer ecosystem — but we also protect the infrastructure and IP of The Undesirables LLC.

✅ What You CAN Do (Free)

• Personal & Educational Use — Download, modify, and run locally for learning, research, or personal projects.
• Non-Competing Applications — Integrate this MCP server into your app, provided your app does not offer TCG market intelligence, pricing aggregation, AI card grading, or on-chain price oracle services as its primary function.
• MCP / Agent Integration — Connect your AI agent to this server for non-commercial use.
• Community Contributions — Security audits, bug fixes, and PRs are always welcome.

🚫 What You CANNOT Do (Use Limitation)

• Competing Oracle — You may not use this code to operate a competing price oracle service on LitVM LiteForge or any compatible chain.
• Commercial Resale — You may not wrap our API, data pipelines, or AI models into a paid service without a commercial license.
• Hosted SaaS — You may not host this software as a service for third parties without written permission.

🔓 Open-Source Conversion

On June 1, 2030 (or 4 years after the first public release of each version), this code automatically converts to the MIT License — fully open source, forever.

🤝 Commercial Licensing

Building a commercial product? Want guaranteed API access or white-label integration? Contact us:

📧 [email protected] · 🐦 @undesirables_ai

© 2026 The Undesirables LLC

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Links

• Website: the-undesirables.com
• Oracle API: oracle.the-undesirables.com
• LitVM LiteForge: liteforge.explorer.caldera.xyz
• Block Explorer: liteforge.explorer.caldera.xyz
• X: @undesirables_ai

Built by The Undesirables LLC — the first and only oracle on LitVM LiteForge.

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