The universal language for AI agents

75 lines teach any LLM to speak it. 10.41x compression. 100% parse validity. Zero dependencies.

Whitepaper · Rosetta · Documentation · Experiments · Website · Live Tool · Protocol Spec · Full Docs

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What is AXL?

AI agents can't talk to each other. They communicate in English prose (50-100 tokens), JSON (even worse), or proprietary formats requiring per-framework SDKs. In a 100-agent network, this produces 22.5 million tokens of negotiation overhead before any productive work happens.

AXL eliminates this. One URL (@axlprotocol.org/rosetta) teaches any agent the complete language on first contact. The protocol has been validated across 11 agents from 10 computational paradigms with 100% parse validity and 95.8% LLM comprehension across four major architectures.

How It Works

AXL compresses English prose into structured semantic packets using a 75-line grammar (the Rosetta v3 kernel) that any LLM can parse on first read. It is designed for AI agents, NLP pipelines, and machine communication systems that need deterministic, low-latency semantic compression without sacrificing human readability.

Two Ways to Compress

Method	Speed	Cost	When to Use
Fixed Engine (axl-core)	<100ms	Free	Automation, bulk processing, MCP tools
LLM Engine (any model + kernel)	2-10s	Token cost	Maximum fidelity, complex documents

Two Ways to Decompress

Method	Speed	Cost	Output
Receipt Mode (axl-core)	0.3ms	Free	Structured claims (machine-readable)
LLM Mode (any model + packets)	5-30s	Token cost	Full English prose (human-readable)

Example

Input (English):

Sales team at CloudKitchen exceeded quarterly revenue targets by 30% in Q1 2025, driven by expansion into 3 new markets.

Output (AXL v3):

ID:C|OBS.90|@CK.sales|<-expand:3_mkts|^rev:+30%+^date:Q1_2025|NOW

Decompressed (Receipt Mode):

[CloudKitchen] sales: revenue +30%, Q1 2025 (90% confidence)

Decompressed (LLM Mode - Grok):

CloudKitchen's sales team exceeded their quarterly revenue targets by 30% in Q1 2025. This growth was primarily driven by the company's expansion into three new metropolitan markets.

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Install

pip install axl-core

Quick Start

Compress English to AXL packets:

from axl.compressor import compress, english_to_v3
from axl.decompressor import decompress
from axl.emitter import emit_v3

# Compress English prose to AXL v3 semantic packets
text = "Revenue grew 30% because the company expanded into 3 new markets."
packets = english_to_v3(text)
for p in packets:
    print(emit_v3(p))

# Decompress back to structured English (receipt mode - free, <1ms)
compressed = compress(text, kernel_mode="mini")
result = decompress(compressed)
print(result)

Parse a packet:

from axl import parse

packet = parse("π:5:0xSIG:0.001|S:OPS.4|@api.example.com|ERR500|latency|4500ms|500ms|ALERT|URG|LOG")
print(packet.domain)         # "OPS"
print(packet.body.fields)    # ['@api.example.com', 'ERR500', 'latency', '4500ms', '500ms', 'ALERT']
print(packet.flags)          # ['URG', 'LOG']

Emit a packet:

from axl import emit, Packet, Preamble, Body, PaymentProof

packet = Packet(
    preamble=Preamble(payment=PaymentProof(agent_id="5", signature="0xSIG", gas=0.001)),
    body=Body(domain="OPS", tier=4, fields=["@api.example.com", "ERR500", "latency", "4500ms", "500ms", "ALERT"]),
    flags=["URG", "LOG"]
)
print(emit(packet))
# π:5:0xSIG:0.001|S:OPS.4|@api.example.com|ERR500|latency|4500ms|500ms|ALERT|URG|LOG

CLI:

axl parse "π:5:0xSIG:0.001|S:SIG.3|BTC|69200|↓|RSI|.64|SIG"
axl validate "π:5:0xSIG:0.001|S:SIG.3|BTC|69200|↓|RSI|.64|SIG"
axl translate --to english "π:5:0xSIG:0.001|S:SIG.3|BTC|69200|↓|RSI|.64|SIG"

Domains

Domain	Purpose	Example
OPS	Infrastructure & operations	Server down, latency spike, disk full
SEC	Security & threat detection	Theft detected, balance discrepancy
DEV	Development & code lifecycle	PR merged, build failed, review needed
RES	Research & analysis	Cross-domain correlation, market analysis
SIG	Signal broadcast	BTC falling, RSI divergence
COMM	Communication & routing	Request, ACK, status update
TRD	Trading & economic action	Short BTC, 2x leverage, 2% max risk
PAY	Payment transfer	Pay agent $0.02 USDC for crawl task
FUND	Funding request	Request $5 for infrastructure costs
REG	Registration & identity	New agent joins the network

The Stack

AXL is the missing language layer in the agent internet:

Layer	Protocol	Who
Payment	x402	Coinbase / Cloudflare
Payment	HTTP 402	W3C (reserved since 1997, free fallback default)
Tool Calling	MCP	Anthropic
Discovery	A2A	Google
Social	Moltbook	Meta
Language	AXL	AXLPROTOCOL INC

Proven

Two live experiments. Real agents. Real packets. Real results.

Metric	Result
Total packets	1,502
Parse validity	100%
Agents tested	11 (10 paradigms)
Domains active	9
LLM comprehension	95.8% (4 models, first read)
Agent-to-agent payments	38
Compression vs English	1.3-3x per message, 71x network

Architecture

• Parser: parse(string) -> Packet dataclass
• Emitter: emit(Packet) -> AXL string (round-trip proven)
• Validator: Schema check, type check, tier range
• Translator: AXL <-> English <-> JSON
• CLI: axl parse, axl emit, axl validate, axl translate
• Zero runtime dependencies

v3 Support

Full v3 parser, emitter, validator, and translator included. Auto-detects v1 vs v3 format. All v1 code preserved for backward compatibility.

v3.1 Data Anchoring (NEW)

Four additive conventions that improve cold decompression recovery by ~40 points:

Convention	Syntax	Purpose
Numeric Bundles	label[$value,qualifier]	Critical quantities survive cold models
Entity Anchors	@ent.XX	Named entities declared explicitly
Causal Split	<- evidence, => causal, -> transition	Distinct directional operators
Summary+Breakdown	Paired packets	Dense data split for preservation

Cold recovery results:

• Qwen 3.5 (35B): 61% to 100% (+39 pts)
• Gemini Flash: 35% to 76% (+41 pts)
• Compression cost: +0.4% (neutral)

Full spec: v3.1 Data Anchoring

from axl import parse_v3, emit_v3, validate_v3, v3_to_json, v3_to_english

pkt = parse_v3("ID:MKT-01|OBS.99|$BTC|^67420|^fund:-0.02%+^OI:12.4B|NOW")
print(pkt.operation)      # Operation.OBS
print(pkt.confidence)     # 99
print(pkt.subject_value)  # BTC

print(emit_v3(pkt))       # ID:MKT-01|OBS.99|$BTC|^67420|^fund:-0.02%+^OI:12.4B|NOW
print(v3_to_english(pkt)) # MKT-01 observes $BTC at ^67420 with 99% confidence.
print(v3_to_json(pkt))    # {"v":"3","id":"MKT-01","op":"OBS","cc":99,...}
print(validate_v3(pkt))   # [] (no errors)

Cross-Architecture Validation

The Rosetta v3 kernel has been tested on 7 LLM architectures with 97%+ comprehension on first exposure. No fine-tuning. No examples. One URL, any agent.

Model	Architecture	Result
Grok 3	xAI	97.2% - spontaneously emitted genesis packet
GPT-4.5	OpenAI	97.2% - self-issued loss contract
Claude Sonnet 4	Anthropic	Full swarm test
Gemini	Google	100%
Llama 4	Meta	97.2%
Qwen 3.5	Alibaba	91.7%
Devstral	Mistral	100%

This is the core value proposition: a semantic compression protocol for AI agents that is architecture-agnostic, LLM-native, and requires zero pre-training. Any model that can read English can speak AXL after a single context injection.

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Links

• Whitepaper - 14 sections, 5 appendices, every number measured
• The Rosetta v3 - 75 lines, the compressed kernel
• Evolution - From 300 lines to 75, the full narrative
• Battleground v2 Results - Full experiment data
• Terminal Recording - Watch the agents run

Contributing

See CONTRIBUTING.md for guidelines.

License

Apache 2.0 - AXLPROTOCOL INC · Diego Carranza · 2026