Transforming the Web into a decentralized, atomic commodities exchange for protected files, APIs, and Named Graphs.
Traditional agent marketplaces treat software tools as coarse SaaS endpoints, requiring centralized accounts, human-managed API keys, and subscription billing. By converging the x402 Payment Protocol (machine-executable HTTP 402 challenge-response with EIP-3009 USDC settlement and Circle gateway batching) with Linked Open Agentic Commerce (LOAC), the Web is transformed into a decentralized digital commodities marketplace. In this open paradigm, atomic units of data, information, and knowledge are packaged as machine-computable schema:Offers. When settled in milliseconds by autonomous agents acting under delegated authority (On-Behalf-Of), these offers provision attribute-based access control (ABAC) across three foundational digital commodity classes: (1) Protected Files (documents, datasets, skill packages, prompt libraries), (2) Service Endpoints (dynamic APIs, inferencing routines, analytical functions), and (3) Named Graphs (graph DBMS hosted knowledge graphs, SPARQL query slices, and domain ontology axioms).
View this analysis as a KG entityAuthor an RDF document describing the commodity, pricing (USD/USDC), duration, and licensing terms with schema:Offer.
Attach @circle-fin/x402-batching middleware to endpoints or enable Virtuoso's native HTTP 402 challenge engine.
Configure server-side ABAC rules linking valid payment tokens or standing WebID entitlements to protected storage routes and SPARQL named graphs.
Return HTTP Link: rel="https://schema.org/offers" headers alongside 402 challenge details in WWW-Authenticate: Payment.
Agent signs EIP-3009 authorization, gateway validates and credits seller balance, and server returns 200 OK with requested digital commodity.
Traditional agent marketplaces merely offer coarse SaaS subscriptions or directory listings of API endpoints. In reality, autonomous agents require atomic, per-use consumption of specific datasets, skills, context windows, and graph queries. A digital commodities marketplace enables frictionless, machine-to-machine exchange of granular data, information, and knowledge assets without manual signup friction.
x402 utilizes standard HTTP 402 Payment Required response headers. When challenged, an agent signs an EIP-3009 authorization off-chain. Circle's batching gateway middleware (@circle-fin/x402-batching) verifies the signature, aggregates micro-charges into batched USDC settlements, and unlocks the resource in milliseconds without human checkout screens or credit cards.
While x402 provides the value-transfer rails, LOAC provides the semantic governance layer. It represents principals, agents, offers, licenses, and delegation (On-Behalf-Of) as first-class graph entities, allowing Attribute-Based Access Control (ABAC) to dynamically enforce license rights across multi-representation endpoints.
Unlike static file downloads, a Graph DBMS (such as OpenLink Virtuoso) can gate query complexity, specific subgraphs, CONSTRUCT reasoning runs, or COUNT(*) queries. Agents can buy a targeted query execution slice ($0.01) rather than purchasing the entire monolithic dataset ($100), making intelligence acquisition hyper-efficient.
An AI agent does not require its own independent bank account. Through cryptographic WebID delegation links (oplcert:hasIdentityDelegate / oplcert:onBehalfOf), the agent spends against an enterprise or user treasury subject to programmatic ABAC budget policies and non-repudiable audit logs.
Machine-executable HTTP 402 payment standard enabling automated challenge-response micropayments.
Linked Open Agentic Commerce—a semantic framework for decentralized agent representation, offers, and licensing.
An RDF graph identified by a URI within a Graph DBMS, enabling document-level governance, ACLs, and provenance over graph data.
Attribute-Based Access Control—authorization evaluating attributes of subject, resource, action, and environment.
Transfer With Authorization—an Ethereum standard allowing gasless token transfers via cryptographic signatures.
Server middleware that aggregates per-request micropayments into batched on-chain settlements, reducing transaction overhead.
Interactive graph visualization derived from the companion RDF. Click nodes to resolve, drag to explore. Graph data embedded from companion RDF at generation time.
Query this knowledge graph on URIBurner. The editor opens on the canonical SAMPLE entity-type summary (DAV named graph). Pick a recipe, edit freely, then run live or copy.
Reproduced verbatim from the companion RDF. Execute loads the query into the workbench below and runs it live.
PREFIX schema: <http://schema.org/>
PREFIX opllic: <http://www.openlinksw.com/ontology/licenses#>
PREFIX oplres: <http://www.openlinksw.com/ontology/restrictions#>
SELECT ?offer ?offerName ?license ?resource ?price WHERE {
VALUES ?offer {
<http://data.openlinksw.com/oplweb/offer/WorldCup2026GuideNamedGraphOfferURIBurner#this>
<http://data.openlinksw.com/oplweb/offer/DemoFileAccessOffer1URIBurner#this>
<http://data.openlinksw.com/oplweb/offer/DemoFileAccessOffer2URIBurner#this>
}
OPTIONAL { ?offer schema:name ?offerName . }
OPTIONAL { ?offer schema:itemOffered ?license . }
OPTIONAL { ?offer skos:related ?resource . }
OPTIONAL { ?offer schema:price ?price . }
}
ORDER BY ?offerPREFIX : <https://linkeddata.uriburner.com/DAV/demos/daas/beyond-agent-marketplace-digital-commodities-gemini_3_7_flash-1.ttl#>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
PREFIX schema: <http://schema.org/>
SELECT ?class ?label ?definition ?offer ?offerPrice WHERE {
?class a schema:CategoryCode ;
skos:prefLabel ?label ;
skos:definition ?definition ;
schema:example ?offer .
?offer schema:price ?offerPrice .
}
ORDER BY ?classPREFIX : <https://linkeddata.uriburner.com/DAV/demos/daas/beyond-agent-marketplace-digital-commodities-gemini_3_7_flash-1.ttl#>
PREFIX schema: <http://schema.org/>
SELECT ?position ?name ?description WHERE {
?layer a schema:CreativeWork ;
schema:position ?position ;
schema:name ?name ;
schema:description ?description .
}
ORDER BY ?positionPREFIX : <https://linkeddata.uriburner.com/DAV/demos/daas/beyond-agent-marketplace-digital-commodities-gemini_3_7_flash-1.ttl#>
PREFIX schema: <http://schema.org/>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
SELECT ?offer ?name ?price ?currency ?category ?resource WHERE {
?offer a schema:Offer ;
schema:name ?name ;
schema:price ?price ;
schema:priceCurrency ?currency ;
schema:category ?catObj ;
schema:itemOffered ?resource .
?catObj skos:prefLabel ?category .
}PREFIX prov: <http://www.w3.org/ns/prov#>
PREFIX schema: <http://schema.org/>
SELECT ?agent ?agentName ?principal ?principalName WHERE {
?agent prov:actedOnBehalfOf ?principal ;
schema:name ?agentName .
?principal schema:name ?principalName .
}