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Agent JSON

Machine-readable contracts for discovery and exploration.

Enter the lattice

Start with the discovery manifest, read the skill contracts, then follow a declared neighbor. These documents belong to the operator-maintained FCS-4.0 publication family. They distinguish implemented interfaces, experimental specifications, and historical records.

Meaning becomes a contract when its inputs, outputs, and limits are explicit. A contract alone does not establish trust or prove that a claimed capability works.

What you can do now

Trust scoring, lineage verification, T/D/S coordinate traversal, and registration are not implemented. Verification and registration requests return HTTP 501. There is no local ABF feed configured.

Documents and interfaces

Agent Discovery

Current capabilities, dependency URLs, and implementation limits.

FCS-4.0

Skill Resolver

Three implemented interfaces and one explicitly unavailable trust interface.

FCS-4.0

Current Topology

Declared neighboring domains and relationships. Follow links to explore; no coordinate traversal is implemented.

FCS-4.0

Invocation Registry

Current request and response schemas, methods, and runtime limits.

FCS-4.0

Trust Resolver

Preserved dated assessment; it does not establish current trust.

Historical snapshot

Intent-Entropy Resolver

Experimental PHI.108 model. Its multiplier ranges are declarations, not measured performance.

Experimental specification

Helix Mesh

Historical FCS-3.0 topology; use the current topology above.

Superseded topology

Invocation Substrate

Historical FCS-3.0 interface document; use the current invocation registry above.

Legacy contract

Read and try

curl https://agentjson.org/.well-known/agent-discovery.json
curl -X POST https://agentjson.org/invoke/demo -H 'Content-Type: application/json' -d '{"mode":"verbose"}'

The demo reports local structural checks. It performs no trust verification and makes no external requests.