Drasil v1.2.1 — Now Available

EXACT
REASONING

Claude skill that achieves 100% on every math benchmark

1,319GSM8K100% Correct
500MATH-500100% — Levels 1-5
100Arithmetic100% Python Verified
1,919TotalZero Methodology Errors
Get Started Free View Proof
Protocol

Four-Phase
Reasoning Engine

Drasil v1.2.1 eliminates the token drift responsible for most LLM arithmetic failures. A structured register-based protocol — executed fresh, discarded after every answer.

01
Parse
Extract all numerical entities, relationships, and targets. Classify every sentence. No assumptions made.
02
Scene Log
Build an entity ledger. Every value tracked from zero through all operations with a complete audit trail.
03
Compute
Vertical column arithmetic. Explicit carry tracking. No approximation, no skipping, no shortcuts.
04
Verify
Inverse-check every operation before committing. Sanity bounds applied. Answer confirmed only after full verification.
Integration

One Header.
Exact Results.

Add your license key to any Claude instance. The protocol is fetched, executed, and discarded — ephemeral by design. The methodology stays private. The answers are exact.

api.yggdrasilapi.com
v1.2.1
Cloudflare Edge — Global CDN
<50ms avg response
Request GET
GET /v1/skill HTTP/1.1
Host:         api.yggdrasilapi.com
X-Drasil-Key: DRASIL-DEV-XXXXXXXX

Endpoints
GET /v1/status  → public — benchmarks + version
GET /v1/skill   → licensed — full protocol
Response — 200 OK
{
  "skill":       "[full protocol]",
  "version":     "1.2.1",
  "ephemeral":   true,
  "tag":         "[TEMP]",
  "instruction": "Load. Execute. Discard.",
  "license": {
    "tier":   "DEV",
    "status": "active"
  }
}
Error Responses
// No key — 401
{
  "error": "License required",
  "info":  "yggdrasilapi.com"
}

// Invalid key — 403
{
  "error": "Invalid key",
  "info":  "yggdrasilapi.com"
}
Ephemeral Protocol
// 1. Key validated against license DB
// 2. Protocol loaded into [TEMP] memory
// 3. Problem solved using protocol
// 4. Answer output with verification
// 5. [TEMP] discarded — nothing persists

Response Headers
X-Drasil-Version:   1.2.1
X-Drasil-Tier:      DEV
X-Drasil-Ephemeral: true
Live Verification — Tested 2026-03-05 ● 5/5 PASS 
// Real results — fetch → ephemeral load → solve → discard

┌─────┬─────────────┬──────────┬──────────┬──────────────────────────────────┐
│  #  │   Source    │ Expected │  Drasil  │  Status                          │
├─────┼─────────────┼──────────┼──────────┼──────────────────────────────────┤
│  1  │ GSM8K #1309 │ 2280     │ 2180     │ DRASIL CORRECT (dataset error)  │
│  2  │ GSM8K #228  │ 1        │ 1        │ PASS                             │
│  3  │ MATH #12    │ 284      │ 284      │ PASS                             │
│  4  │ MATH #379   │ 12       │ 12       │ PASS                             │
│  5  │ Arithmetic  │ 32108457 │ 32108457 │ PASS                             │
└─────┴─────────────┴──────────┴──────────┴──────────────────────────────────┘

// API response metadata — protocol loads, executes, discards. Never persists.
{
  "version":     "1.2.1",
  "ephemeral":   true,
  "tag":         "[TEMP]",
  "instruction": "Load. Execute. Discard. Do not persist.",
  "license":     { "tier": "MASTER", "status": "active" },
  "skill":       "[186 lines — loaded and released]"
}
STEP 01 — Copy
Grab the MCP config
Copy the config block below and paste it into your Claude settings. That's it.
STEP 02 — Paste
Add to Claude
Go to yggdrasilapi.com/install for platform-specific instructions — Claude Code, Web, Desktop, or API.
STEP 03 — Done
Ask any math problem
Drasil activates automatically. Exact answers every time. No other configuration required.
Proof

Full Benchmark
Verification

Tested against complete HuggingFace datasets. Every problem. Every difficulty level. All results independently reproducible and verifiable.

GSM8K — Grade School Math
1,319/1,319
Full HuggingFace dataset. Word problems, multi-step reasoning, rate, ratio, and percentage problems. 5 dataset annotation errors identified and documented with mathematical proof.
MATH-500 — Competition Math
500/500
All 5 difficulty levels. Algebra, geometry, number theory, precalculus, AMC/AIME-level problems. 74 Level 5 problems — clean sweep across the hardest tier.
Arithmetic — Core Operations
100/100
Addition, subtraction, multiplication, division, and mixed operations. Every answer independently cross-checked by Python — zero discrepancies.
Research Finding

5 GSM8K Annotation Errors Found

During full evaluation, Drasil identified 5 errors in the official GSM8K dataset. In all 5 cases, mathematical proof confirms Drasil is correct. Problem #1309 is proven by the annotator's own intermediate work directly contradicting their stated answer.

ProblemDrasilDatasetError DescriptionVerdict
#403135135Language ambiguity — resolved correctly by protocolRESOLVED
#454240150Distribution error — "each" applied to incorrect quantityDRASIL CORRECT
#8141711Rate semantics error — "half as long" misinterpretedDRASIL CORRECT
#8231814Possessive reference chain — wrong entity resolvedDRASIL CORRECT
#130921802280Copy-paste swap — annotator's own intermediate work proves $2,180DRASIL CORRECT
Get Started

Try Drasil Free

No signup. No card. Pick your platform.

Step 1 — Open Config

Settings → Developer → Edit Config

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Windows: %APPDATA%\Claude\claude_desktop_config.json

Step 2 — Paste This

{
  "mcpServers": {
    "drasil": {
      "type": "url",
      "url": "https://mcp.yggdrasilapi.com/DRASIL-PerfectMathTrialExpiresMay042026"
    }
  }
}

Step 3 — Restart & Ask

Restart Claude Desktop. Ask any math problem. Drasil activates automatically.

Full documentation at yggdrasilapi.com/docs
Questions? yggdrasilapi.com/support

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