SYMIONE
Protocol Layer
Quiet infrastructure. Certain economics.

Autonomous economic action.

Every agent move begins as intent. Rules bind it. Action proves it. Settlement writes the trace.

Intent
Declared
Rules
Locked
Action
In Progress
Proof
Pending
Validation
Locked
Settlement
Locked
Trace
Locked
Current intent
Authorize agent purchase order
Value
18.40 USDC
Network
Base
Status
In Progress
Scenario —
Signed intent. Certain path.
Every intent carries rules. Every action produces proof. Every settlement writes a trace.
Protocol surface
  • Signed intents
  • Programmable policy
  • Verified payment
  • Canonical trace
01 — Protocol

Seven states. One canonical path.

Autonomous economic actions move through a shared sequence. A signed intent declares the move, rules bind it, execution produces proof, validated work settles, and the full sequence is recorded as a trace.

01
Intent declares
A signed declaration of what an autonomous actor intends to do, against which budget, under which constraints.
canonical formtyped signature
scope · ttl · nonce
02
Rules bind
Programmable policy attached to the intent. Rules define spend ceilings, vendor allowlists, time windows, scopes, approval thresholds, and operational limits.
policybudgets · vendors
windows · scopes
03
Action executes
The agent, browser, service, or machine performs the requested action against the bound rules. Execution can be observed, paused, rejected, or emitted back into the sequence.
executionagent · browser
machine · service
04
Proof witnesses
Evidence that the action happened as declared: x402 payment authorizations, signed receipts, browser events, service logs, validator attestations, or external witnesses.
witnessx402 payment
signed receipts
05
Validation accepts
Proof is checked against the original rules. Validation is deterministic by default, with external attestors available for surfaces requiring additional judgment.
validationnative engine
external attestors
06
Settlement releases
Value moves after validation passes. Settlement runs through Base USDC, x402-compatible payment flows, or other rails exposed through the protocol surface.
railBase · USDC
x402-compatible
07
Trace records
An append-only record of the complete sequence. The trace is signed, indexed, replayable, and audit-ready. For many surfaces, the trace also becomes the invoice.
auditappend-only
signed · indexed
02 — Surfaces

One grammar. Multiple economies.

SYMIONE applies the same state model to every surface where autonomous actors transact.

01 · Publisher monetization

Crawler-priced content. Line-item billing.

Publishers expose machine-readable prices for content access. Agents pay before they read. Each fetch produces a verifiable trace.

intent rules action settlement
02 · Machine-to-machine commerce

Agent wallets with policy-bound spending.

Agents transact against approved budgets, vendors, scopes, and time windows. Every transaction settles with a trace.

intent rules proof settlement
03 · API metering

Endpoints that price themselves.

APIs expose payment requirements directly inside the request loop. Agents resolve payment and access through the same flow.

intent proof action trace
04 · Compute markets

Per-second compute. Verifiable consumption.

Compute providers expose price curves. Autonomous buyers consume resources against measurable usage and proof.

rules action proof settlement
05 · Conditional payouts

Work releases value when proof passes.

Tasks define completion conditions upfront. Validators check proof. Settlement releases against accepted results.

intent action validation settlement
06 · Enterprise approvals

Policy as settlement logic.

Procurement, compliance, and approval rules become executable protocol constraints. The trace becomes the audit surface.

rules validation settlement trace
03 — Infrastructure

Built on what already settles.

SYMIONE composes existing primitives into a small, opinionated protocol surface for autonomous economic action.

Payment authorization
x402-compatible
HTTP-native · agent-readable · stateless
Settlement
Base · USDC
L2 · ~2s finality · USD-denominated
Intent
typed signed
canonical · scoped · replayable
Policy
programmable
budgets · vendors · windows · scopes
Validation
deterministic
native engine · external attestors
Trace
append-only
audit-grade · signed · indexed
Edge enforcement
Cloudflare Worker
drop-in gateway · CDN-level enforcement · machine-readable access
Developer surface
SDK · REST
TypeScript today · Python preview · Go planned
04 — Protocol records Sample traces

For teams building
autonomous economic systems.

SYMIONE is available for selected technical partners, agent frameworks, publisher infrastructure, API providers, and teams shipping machine-native transaction flows.

x402-compatible · Base USDC settlement · Typed signed intents · Cloudflare edge enforcement · WordPress alpha