# 404humans.xyz

**Canonical:** https://apis.io/providers/404humans-xyz/  
**Website:** https://404humans.xyz/  
**APIs profiled:** 1

404humans.xyz operates a decentralized billboard platform called the 402 Wall, where each pixel block can be owned via blockchain payment. Users can view the wall, purchase unclaimed blocks by answering HTTP 402 challenges, and programmatically interact via a public API. The service runs on the Ethereum-compatible network eip155:8453, offering a novel way to embed reputation and digital art on the web. It provides endpoints for canvas retrieval, block acquisition, pixel painting, and agent registration, all documented in OpenAPI and MCP formats.

## Kin Score — 6.3 / 100 (minimal)

Scored 2026-11-06 under rubric 0.27.0. Trend: flat (-0.7 from 7.0).

| Facet | Score |
|---|---|
| Discoverability | 56.7 |
| Contract Quality | 0.0 |
| Contract Governance | 4.5 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 3.6 |
| Access Clarity | 0.0 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 10.8 (matched via fallback).

## Agent readiness — 3.5 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| 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

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (1)

- **402 Wall API** — Public API for the 402 Wall billboard platform

## MCP servers (1)

- **404humans.xyz MCP Server** — Remote MCP server at 404humans.xyz.

## Security (1)

- **404Humans Xyz Domain Security** — TLSv1.3 · DMARC

## Tags

On-chain Advertising

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/404humans-xyz/). Scores are computed from the provider's own public artifacts under a published rubric.