# dVeracity Semantic API

> Verified emissions data and the Open Footprint canonical model, for agents. Eighteen read-only tools over MCP (remote Streamable HTTP with OAuth 2.1, or the stdio npm package): natural-language queries over a verified emissions knowledge graph (metered), the Open Footprint model — entities, sectors, O-DEF semantics, sector guardrails (free) — validation of payloads against the model and published guardrails (metered), and approved regulatory compliance policies (paid plans). Credit-billed with machine-readable HTTP 402 semantics; optional vLEI-verified agent identity (GLEIF-rooted Agent Authorization credentials).

- **Domain**: `dveracity.com`
- **Provider**: dVeracity (https://dveracity.com)
- **Kind**: a2a_agent
- **Live-responds (last probe)**: False
- **Signed card**: False
- **Streaming**: False
- **Quality score**: 76%

## Skills
- **semantic_query** — Ask a natural-language question about verified emissions data (Open Footprint / PPDM / OGMP-methane knowledge graphs). Cost: metered per credit.
- **semantic_templates** — List the query templates the semantic layer supports (free). Cost: free.
- **credits_balance** — Show the remaining dVeracity API credit balance for this account (free). Cost: free.
- **list_standards** — List the sustainability data standards dVeracity can validate against (free). Cost: free.
- **validate_data** — Validate a data payload against a supported sustainability standard (Validation-as-a-Service). Cost: metered per credit.
- **keri_identity** — Show this agent's verified vLEI identity (agent AID, Legal Entity LEI, authorized scopes) if KERI mode is configured — free. Cost: free.
- **ofp_models** — List the eight Open Footprint canonical model domains and which database dialects have published DDL (free). Cost: free.
- **ofp_search_entities** — Search the 239 canonical Open Footprint entities by concept (free). Cost: free.
- **ofp_entity** — Get one canonical entity in full (free): fields with types and required flags, primary key, relationships, and the physical database table implementing it. Cost
- **ofp_sectors** — List industry sectors and their reference implementations (free). Cost: free.
- **ofp_sector** — Get one sector in full (free): its classification, status, reference artifacts and nested industries. Cost: free.
- **ofp_policies** — Get a sector's policy guardrails as Rego source (free), with policies[].inputs listing the record types and input fields each policy reads — e-ledger fields suc
- **compliance_policies** — List APPROVED regulatory compliance policies — rules AI-extracted from a regulation (for example EU Green Bonds, CSRD/ESRS) and approved by a dVeracity admin. C
- **compliance_policy** — One APPROVED regulatory compliance policy in full: its Rego source, the structured rules the extractor produced, the record types and input fields the Rego read
- **ofp_validate** — Check a data payload against the canonical Open Footprint model and, when a sector is named, that sector's published Rego guardrails. Cost: metered per credit.
- **ofp_semantics** — List the O-DEF semantic codes carried by the canonical model (free). Cost: free.
- **ofp_semantic_code** — Show which canonical fields carry one O-DEF semantic code (free). Cost: free.
- **ofp_model_provenance** — Show which snapshot of the Open Footprint standard this deployment serves (free): source commit, date, and entity/sector counts. Cost: free.

## URLs
- Agent card: https://dveracity.com/.well-known/agent.json
- Page (HTML): https://agenstry.com/agents/dveracity.com
- Documentation: https://dveracity.com/api/v1/semantic/manifest