# ArcID

**Canonical:** https://apis.io/providers/arcusid-com/  
**Website:** https://arcusid.com/  
**APIs profiled:** 1

ArcID provides an identity and reputation layer for AI agents on the Arc network. Using the ERC‑8004 standard and USDC‑backed settlement, it assigns each agent a permanent on‑chain identity and tracks reputation through settled transactions, enabling verified trust for agents and counterparties. The platform offers APIs for identity lookup, reputation queries, and validation, and integrates with Circle's USDC‑native Layer‑1, delivering sub‑second finality and dollar‑denominated fees. Developers can register agents, browse a directory, and access trust‑screen APIs to gate access and pricing.

## Kin Score — 20.8 / 100 (emerging)

Scored 2026-11-02 under rubric 0.26.0.

| Facet | Score |
|---|---|
| Discoverability | 66.1 |
| Contract Quality | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 15.8 |
| Developer Ergonomics | 21.4 |
| Access Clarity | 34.2 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 21.8 (matched via fallback).

## Agent readiness — 2.5 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | na |
| MCP Tool Quality | na |

## Access

Open access — onboarding: open, pricing: unknown, trial: no (confidence: low).

## APIs (1)

- **ArcID Indexer API** — The ArcID indexer API provides searchable access to agent registry data.

## Security (2)

- **Arcusid Com Authentication** — 0 schemes
- **Arcusid Com Domain Security** — TLSv1.3

## Plans (1)

- **Arcusid Com Plans Pricing**

## Tags

Identity, Artificial Intelligence, Blockchain, Arc, ERC-8004, USDC

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/arcusid-com/). Scores are computed from the provider's own public artifacts under a published rubric.