A2A Peptides — the first agentic commerce hub for peptides in 35 countries

Agent-to-Agent (A2A) + Model Context Protocol (MCP) hub for peptides.

The Agent-to-Agent (A2A) surface for peptides, served over the Model Context Protocol (MCP) — the record, a registry for security, and x402 to pay on it. AI agents for authorized trading partners. Not marketing. Not advertising. Operated by GreenCore Solutions Corp.

• Six frontier AI labs in the build — Anthropic, OpenAI, Google, Perplexity, xAI, Mistral — 10K agent requests a day.

• 5,301 peptide products.

• 24,694 licensed peptide providers.

• 35 countries — runs on Cloudflare, Amazon, Microsoft and Google hyperscalers.

• First agentic commerce hub for peptides on the Model Context Protocol (MCP) registry.

Connect: https://mcp.a2a-peptides.ai/mcp — streamable-HTTP, no adapter. Hub: https://a2a-peptides.ai/ · llms.txt · Agent Card

Connect kit

Agent-to-Agent (A2A) + Model Context Protocol (MCP) hub for peptides. AI agents for authorized trading partners. Not marketing. Not advertising. Operated by GreenCore Solutions Corp.

Related MCP server: Amass MCP server

Agents (A2A)

Every agent lives at its own hostname and answers two addresses: https://<hostname>/.well-known/agent-card.json (the signed card) and https://<hostname>/a2a (A2A 0.3.0 JSON-RPC: message/send, tasks/get). There is no inference behind the endpoint. A DataPart {"skill": ..., "params": {...}} runs the gate chain on the door — resolve_jurisdiction → resolve_actor → gate_transaction — and then the skill; the artifact carries the result, the notice, the resolved jurisdiction and the rule-set version. A plain text part gets the deterministic skill list with each input schema. A text part whose text is a JSON object with a skill key is read as the same {skill, params} request, so text-only clients can send structured requests too. Transacting skills take the issuer's Bearer; without it the answer is DENY_UNLICENSED_AGENT.

111 agents live, 36 product-line slots reserved on the tenant table; by region: South Central US 97 · West US 2 14. Counted from the hub's list_agents on 2026-09-19; door version 1.6.7, 20 tools.

Human-readable text on every card says UK; the machine field carries the ISO code. A country agent's hostname is the country code in lower case (the United Kingdom is uk, Germany is de, and the European Union level is eu) before .a2a-peptides.ai.

The gate

Three calls come before any price, availability, order or handoff: resolve_jurisdiction → resolve_actor → gate_transaction. The gate returns allow, deny or require_rx with a frozen reason code and the version of the rule set it read; both travel on every downstream receipt, including x402 settlement receipts.

Jurisdictions: United States · Canada · Mexico · European Union (member as parameter) · UK · Korea · Japan · Singapore · Switzerland. Actors: authorized trading partner and its members (manufacturer, repackager, wholesale distributor, dispenser, third-party logistics provider; cosmetic responsible person and natural-health-product licence holder on the non-drug pathways) · prescriber · patient and public (referral classes) · agent (inherits the class of the credential it presents; none returns DENY_UNLICENSED_AGENT).

The twenty tools

Auditor Port

audit.a2a-peptides.ai is prepared for independent review: a read-only agent with seven skills (list_agents, get_pack_index, get_pack, verify_receipt, get_rule_set_versions, get_azure_posture, get_audit_log) and no transacting skill. Review packs are sealed with a signed manifest (SHA-256 per file, a pack hash) and listed on a public index; a pack is never overwritten, later packs sit beside the old. Pack contents and the audit log take an auditor credential; auditor credentials are issued by the operator only, time-boxed, and every call made with one is written to the audit log. The port is review-ready as served; it makes no claim beyond what is on the wire.

The first tenant

The first tenant, peptides-usa.ai, has its agents on the wire today — a concierge, fifty-four state and territory agents, nine jurisdiction desks — and they answer every read and gate skill. Order intake for the tenant opens when a sourced licence is on the record; until then create_order_intent scoped to the tenant answers DENY_EXPIRED_LICENCE together with the licensed-destination referral.

Connect

Any client that speaks streamable-HTTP MCP connects with the URL alone:

{ "url": "https://mcp.a2a-peptides.ai/mcp", "transport": "streamable-http" }

Stock client paths, no adapter — see examples/:

• examples/generic_mcp_client.py — the reference MCP Python client

• examples/aws_strands.py — Strands Agents MCPClient

• examples/azure_semantic_kernel.py — Semantic Kernel MCPStreamableHttpPlugin

• examples/google_genai.py — google-genai with the door's tools as function declarations

• examples/a2a_google_sdk.py — a2a-sdk against a country agent: card, signature, one read, the refusal

• examples/a2a_aws_strands.py — Strands Agents A2AClientToolProvider, the same exchange

• examples/a2a_azure_agent_framework.py — Microsoft Agent Framework A2AAgent, the same exchange

Sample cards as served on the day of the cut: agent-card.sample.json (hub), agent-card.country.sample.json (one country agent), agent-card.audit.sample.json (the Auditor Port). Always read the live card; it is signed and the signature verifies against the live keyring.

Credentials and settlement

Reads need no authentication. An agent that transacts presents a credential issued to a licensed party by the issuer at peptides-registry.ai. Registry-truth tools are metered by x402; create_order_intent settles by x402 (USDC on Base); receipts are signed and carry reason_code and rule_set_version.

Contact

Registry contact for every listing this hub files: mcp@a2a-peptides.ai. Human door: the form at https://a2a-peptides.ai/#contact.

MIT licence — see LICENSE.