Bind approved intent to verified effect.
Run MUJ428 from a system MUJ428 does not control. The challenge exercises authorization → authenticated Trust Receipt consumption → COMMITTED Verified Effect → replay denial in the public TESTNET_CONFORMANCE sandbox.
$0moves_money=falseproduction_authority=falseMCP Registry v1.6.4
Open runnable example Machine contractBind the proposed action
The sandbox issues an authenticated receipt bound to the requested action and current premises.
Consume at the boundary
The executor validates and consumes the receipt before committing the sandbox effect.
Verify the effect
A Verified Effect records COMMITTED; replaying the same authorization must be denied.
Fastest run
Download the public example and run it from your own environment. No wallet, payment signature, API key, or paid credential is required.
curl -fsS https://agents.muj428.com/examples/external-verified-effect.mjs -o external-verified-effect.mjs node external-verified-effect.mjs
A valid run performs the replay itself and prints machine-readable fixture_sha256, receipt_digest, the committed verified_effect, and a replay_proof. The replay proof must show replay_denied=true with NONCE_ALREADY_CONSUMED or EFFECT_ALREADY_COMMITTED. A MUJ428-controlled CI run does not count as external adoption; an independently attributable outside run does.
What to send back
For independent validation, share only non-secret evidence: your organization/project name, run timestamp, environment, fixture hash, receipt digest, resulting effect state, and the emitted replay proof. Do not send private keys, payment credentials, or proprietary payloads.
Technical contact: agent@muj428.com · Commercial contact: sales@muj428.com
After the $0 proof
Use MUJ428 in a real workflow through REST, MCP, A2A, x402, or framework middleware. Trust Reflex includes the first 1,000 qualifying evaluation decisions free, then costs $0.01 per qualifying production preflight. Evidence Signal is $0.25 USDC. Transaction Assurance remains available for higher-value consequential actions.
View pricing Developer contract MCP Server CardVerification boundaries
- Official MCP Registry identity:
io.github.wmujahid428-web/muj428-trust-layer, version1.6.4. - Free preflight is triage and has no execution authority.
- MUJ428 does not custody transaction principal and does not auto-spend.
- This page is an invitation to validate; it is not a claim of third-party adoption or endorsement.