How AI is applied across API Evangelist and APIs.io. Read my AI disclosure →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC

Accord Project

Accord Project is an open-source stack for smart legal contracts. Its Concerto modeling language and contract templates now position it as the agreement layer beneath agent authorization and checkout protocols: the terms a payment credential can point to but cannot itself enforce.

Accord Project is an open-source stack for smart legal contracts. Its Concerto modeling language and contract templates now position it as the agreement layer beneath agent authorization and checkout protocols: the terms a payment credential can point to but cannot itself enforce.

Where it stands

As of 2026-10-15, the Agentic Standards Map records:

Open-source smart legal contract stack of Accord Project, a Series of LF Projects, LLC; its documentation page “Agentic Commerce” (no date on the page, last changed 2026-07-07 in the repository history, read 2026-10-15) describes it as the agreement layer beneath authorization and checkout protocols. The Concerto model of x402 presented on 2026-07-22 is pull request #194 of accordproject/models, open on 2026-10-15 (last update 2026-08-05).

Why it matters to agents

The documentation page says “Accord Project is the agreement layer” and calls its three integration patterns (an authorization credential binding a contract by hash, Concerto as schema language for a constraint registry, contract logic for terms “authorization can’t enforce”) “illustrative”, describing “technical fit, not partnerships or endorsements” with AP2, UCP, ACP and Verifiable Intent. …

Sources

Status and relevance quoted, shortened, from the Agentic Standards Map by Francesco Marinoni Moretto, CC BY 4.0, https://frmoretto.github.io/agentic-standards-map/. The full entry, with every dated source, is in map.json under accord-project.

Industry: legal

Related standards

Standards this one builds on, supersedes, profiles or is commonly deployed beside.