Peptidal — the Agent-to-Agent (A2A) + Model Context Protocol (MCP) hub for peptides

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 Peptidal AI Corp.

Six frontier AI labs in the build — Anthropic, OpenAI, Google, Perplexity, xAI, Mistral — 10K agent requests a day.
Products, licensed providers, countries, door version and tool count: read live at https://mcp.peptidal.ai/live.json (never typed here).
Runs on Cloudflare, Amazon, Microsoft and Google hyperscalers.
First agentic commerce hub for peptides on the Model Context Protocol (MCP) registry.

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

Peptidal is the public brand; A2A Peptides stays the stack name (this repository, the registry namespace io.github.Dosidal, tool names). Every agent host answers on both peptidal.ai and a2a-peptides.ai with the same signed 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 Peptidal AI Corp.


Hub	https://peptidal.ai/ · setup · docs · llms.txt
MCP door of record	`https://mcp.peptidal.ai/mcp` — streamable-HTTP, stateless, server name `a2a-peptides`; door version and tool count at request time: https://mcp.peptidal.ai/live.json. The earlier address `https://mcp.a2a-peptides.ai/mcp` keeps answering (same app, no redirect).

| A2A endpoint | https://<hostname>/a2a on every agent — A2A 0.3.0 JSON-RPC, message/send and tasks/get; the preferred interface on every card | | Agent Card | https://peptidal.ai/.well-known/agent-card.json — signed ES256, kid a2ap-2026-09 | | Keyring | https://peptidal.ai/.well-known/jwks.json | | Issuer | https://peptides-registry.ai/.well-known/oauth-authorization-server — client-credentials Bearer for the transacting skills; reads need none | | Auditor Port | https://audit.peptidal.ai/packs/index.json — the public index of sealed review packs | | Registry | namespace io.github.Dosidal (the registry grants the GitHub login case), server a2a-peptides — server.json | | Family | hub · peptides-registry.ai (registry) · peptides-x402.ai (payments door) · a2a-pharma.ai (pharma gate) · peptides-usa.ai (first tenant) |

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.

Role	Hostname	Agents	Region
Hub (concierge)	peptidal.ai	1	South Central US
Registry (token questions)	peptides-registry.ai	1	South Central US
Payments door (receipt questions)	peptides-x402.ai	1	South Central US
Country agents	country code + .peptidal.ai (the United Kingdom is uk; the European Union level is eu)	36	South Central US
Actor-class entry points	pharmacy · prescriber · wholesaler · brand + .peptidal.ai	4	South Central US
Pharma gate	a2a-pharma.ai	1	South Central US
Handoff (referral only)	handoff.peptidal.ai	1	South Central US
Enforcement watch	watch.peptidal.ai	1	South Central US
Auditor Port	audit.peptidal.ai	1	South Central US
Tenant concierge	peptides-usa.ai	1	South Central US
State and territory agents	us- + state or territory code + .peptides-usa.ai	54	South Central US · West US 2
Jurisdiction desks	us · ca · mx · eu · uk · kr · jp · sg · ch + .peptides-usa.ai	9	South Central US

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 and tool count: https://mcp.peptidal.ai/live.json

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 tools

Group	Tools
Gate (3)	resolve_jurisdiction · resolve_actor · gate_transaction
Regulatory truth (5)	get_substance_record · get_pathway_status · get_compounding_eligibility · get_label_and_indication · get_enforcement_watch
Cleared catalogue (3)	search_cleared_items · get_item · compare_presentations
Licensed supply (3)	find_licensed_supplier · get_availability · get_price
Quality (2)	get_lot_coa · verify_serialization
Commerce (2)	create_order_intent · a2a_handoff
Operations (2)	get_safety_label · log_audit

Auditor Port

audit.peptidal.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.peptidal.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://peptidal.ai/#contact.

MIT licence — see LICENSE.

a2a-peptides

Documentation