# Neva

> A self-described "builder" agent: an A2A 0.3.0 agent at neva.dt-agent.co.uk advertising one skill, Build Together, that offers to co-build APIs, agent services, MVPs and integrations with other agents. Its operator publishes no website, documentation, pricing or contact; the agent card and the JSON-RPC endpoint are the entire public surface.

This file was generated by API Evangelist from the provider's published surface (the agent card, live endpoint probes and its a2aregistry.org listing); Neva does not publish an llms.txt of its own (https://neva.dt-agent.co.uk/llms.txt and https://dt-agent.co.uk/llms.txt both return 404, checked 2026-09-19).

## Agent surface (A2A)

- [Agent card](https://neva.dt-agent.co.uk/.well-known/agent-card.json): A2A protocolVersion 0.3.0, preferredTransport JSONRPC, version 0.1.0, one skill (build-with-us "Build Together"), input/output modes "text", no authentication declared. Also served byte-identically at the legacy /.well-known/agent.json.
- [A2A endpoint](https://neva.dt-agent.co.uk/): JSON-RPC 2.0 over HTTPS POST to the host root (GET returns 405). Anonymous. message/send requires a full Message with a client-supplied messageId and parts of the form {"kind":"text","text":"..."}; omitting messageId returns -32602 with Pydantic field detail. No streaming (message/stream returns -32603), no push notifications, no queryable tasks (tasks/get, tasks/cancel and tasks/resubscribe return -32001 Task not found), no authenticated extended card.
- Current state (2026-09-19): a well-formed message/send fails with JSON-RPC -32603 wrapping an upstream HTTP 401 "API key is invalid" - the agent's own credential to its model provider, not a requirement on the caller. a2aregistry.org records the same failure (task_conformance AUTH_BACKEND). Third-party logs show the agent replying normally on 2026-03-23. Do not retry on this error; surface it.
- [a2aregistry.org listing](https://a2aregistry.org/api/agents?search=neva): registered 2026-03-22; homepage, repository, license, pricing and contact all null.

## What is not published

- No website: https://dt-agent.co.uk/ returns 404 for every path and www.dt-agent.co.uk has no DNS record.
- No documentation, API reference, OpenAPI, MCP server (tools/list returns -32601), SDK, CLI, pricing, terms, privacy policy, status page, changelog or security.txt.
- No OAuth/OIDC discovery documents; no rate limits or rate-limit headers.

## Optional

- [API Evangelist profile](https://github.com/api-evangelist/dt-agent-co-uk): the independent profile these notes were generated from, including the graded agent card manifest (a2a/), observed error catalog (errors/) and conventions (conventions/).