Neva

Neva A2A Agent

Neva's agent-to-agent surface: an anonymous A2A 0.3.0 JSON-RPC endpoint at the root of neva.dt-agent.co.uk (POST only; GET returns 405) implementing the a2a-sdk method set. message/send takes a full Message with a mandatory client-supplied messageId and {"kind":"text","text":...} parts; there is no streaming, no push notifications, no queryable tasks and no authenticated extended card. One skill, build-with-us. On 2026-09-19 a well-formed message/send returned JSON-RPC -32603 wrapping an upstream HTTP 401 "API key is invalid" - the agent's own model-provider credential - so the agent validates but does not currently reply. No OpenAPI, documentation or SDK.

GitHub

Documentation

📖
Authentication
https://raw.githubusercontent.com/api-evangelist/dt-agent-co-uk/refs/heads/main/authentication/dt-agent-co-uk-authentication.yml
📖
RateLimits
https://raw.githubusercontent.com/api-evangelist/dt-agent-co-uk/refs/heads/main/rate-limits/dt-agent-co-uk-rate-limits.yml

Other Resources

🔗
AgentCard
https://raw.githubusercontent.com/api-evangelist/dt-agent-co-uk/refs/heads/main/a2a/dt-agent-co-uk-a2a.yml
🔗
Conventions
https://raw.githubusercontent.com/api-evangelist/dt-agent-co-uk/refs/heads/main/conventions/dt-agent-co-uk-conventions.yml
🔗
ErrorCatalog
https://raw.githubusercontent.com/api-evangelist/dt-agent-co-uk/refs/heads/main/errors/dt-agent-co-uk-problem-types.yml
🔗
Conformance
https://raw.githubusercontent.com/api-evangelist/dt-agent-co-uk/refs/heads/main/conformance/dt-agent-co-uk-conformance.yml
🔗
Lifecycle
https://raw.githubusercontent.com/api-evangelist/dt-agent-co-uk/refs/heads/main/lifecycle/dt-agent-co-uk-lifecycle.yml
🔗
APIsJSON
https://raw.githubusercontent.com/api-evangelist/dt-agent-co-uk/refs/heads/main/apis.yml

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API entry from apis.yml

apis.yml Raw ↑ 
aid: dt-agent-co-uk:neva-a2a-agent
name: Neva A2A Agent
description: 'Neva''s agent-to-agent surface: an anonymous A2A 0.3.0 JSON-RPC endpoint at the root of
  neva.dt-agent.co.uk (POST only; GET returns 405) implementing the a2a-sdk method set. message/send takes
  a full Message with a mandatory client-supplied messageId and {"kind":"text","text":...} parts; there
  is no streaming, no push notifications, no queryable tasks and no authenticated extended card. One skill,
  build-with-us. On 2026-09-19 a well-formed message/send returned JSON-RPC -32603 wrapping an upstream
  HTTP 401 "API key is invalid" - the agent''s own model-provider credential - so the agent validates
  but does not currently reply. No OpenAPI, documentation or SDK.'
humanURL: https://neva.dt-agent.co.uk/.well-known/agent-card.json
tags:
- A2A
- AI Agents
- JSON-RPC
- Agent Services
properties:
- type: AgentCard
  url: a2a/dt-agent-co-uk-a2a.yml
  name: A2A Agent Card (graded, verbatim body alongside)
- type: Authentication
  url: authentication/dt-agent-co-uk-authentication.yml
- type: Conventions
  url: conventions/dt-agent-co-uk-conventions.yml
- type: ErrorCatalog
  url: errors/dt-agent-co-uk-problem-types.yml
- type: RateLimits
  url: rate-limits/dt-agent-co-uk-rate-limits.yml
- type: Conformance
  url: conformance/dt-agent-co-uk-conformance.yml
- type: Lifecycle
  url: lifecycle/dt-agent-co-uk-lifecycle.yml
overlays: []
x-humanurl-note: The provider publishes no human-readable page; the agent card is the only document that
  describes the API, so it stands in as humanURL rather than a URL that returns 404 (the apex) or 405
  (the endpoint).