Drasil v1.2.1 — Now Available

EXACT
REASONING

The only Claude skill to achieve 100% on every math benchmark

1,319GSM8K100% Correct
500MATH-500100% — Levels 1–5
100Arithmetic100% Python Verified
1,919TotalZero Methodology Errors
Get License — $20 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:   1.2.0
X-Drasil-Tier:      DEV
X-Drasil-Ephemeral: true
STEP 01 — Purchase
Get your license key
Purchase below. Receive a DRASIL-DEV-XXXXXXXX key by email within minutes of payment.
STEP 02 — Configure
Set your key
Add DRASIL_KEY=your-key to your Claude Code environment. One line, one time.
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
Licensing

One Key.
Full Access.

One-time purchase. No subscriptions. No usage limits. Your license key works in any Claude instance — Claude Code, claude.ai, the API, anywhere Claude runs.

Free Trial
$0
6 hours of full access
Try before you buy — no credit card
  • Drasil v1.2.1 full protocol
  • 1 trial key — /v1/skill access
  • 6 hours from first use
  • Claude Code + claude.ai compatible
  • Full protocol — nothing held back
  • Permanent access
  • Updates after trial
Get Trial Key
Full License
$20
one-time purchase
Permanent access — no expiry, no limits
  • Drasil v1.2.1 full protocol
  • 1 API key — /v1/skill access
  • Never expires
  • Claude Code + claude.ai compatible
  • All v1.x updates included
  • Email support
  • Commercial use permitted
Purchase — $20
Secure payment via Credit Card PayPal Keys delivered by email within minutes  ·  Questions? [email protected]
FAQ

Common
Questions

What exactly does Drasil do?
Drasil is a proprietary reasoning protocol delivered via API that gives Claude a structured four-phase system for solving math problems. When your license key is set, Claude fetches the protocol, executes it on your problem, then discards it. The result is exact arithmetic — verified answers with no hallucination, no arithmetic drift, no skipped steps.
How do I install it?
Set DRASIL_KEY=DRASIL-DEV-XXXXXXXX in your Claude Code environment file. That's the entire installation. No files to download, no SKILL.md to manage. The protocol is fetched from our API automatically when needed and discarded after each use.
Does it work with claude.ai or only Claude Code?
It works anywhere Claude runs. Claude Code is the primary integration path — add DRASIL_KEY to your env and it activates automatically. For claude.ai or direct API usage, include the key reference in your system prompt. Contact support for setup guidance on any platform.
Why does it achieve 100% when standard Claude doesn't?
Standard Claude solves math by holding intermediate values in token attention — which drifts over multi-step problems. Drasil gives Claude an explicit structured register: entities are tracked in a ledger, arithmetic is done step-by-step, and every operation is verified before the answer is committed. The protocol is proprietary and delivered fresh per-request — not stored in your context.
What are the 5 GSM8K dataset errors?
During evaluation of all 1,319 GSM8K problems, Drasil found 5 cases where the official dataset answer is mathematically incorrect. In all 5 cases Drasil's answer is provably correct. Problem #1309 is the clearest case — the annotator's own intermediate calculations prove the answer should be $2,180, not $2,280. Full documentation available on request.
Is there a refund policy?
Yes. If Drasil doesn't perform as documented within 30 days of purchase, contact us for a full refund. The benchmark results are reproducible — we stand behind them completely.
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