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MCP-A2A Task Bridge
x402
MCP-A2A Task Bridge is a paid API for AI agents from phion.systems, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-22).
Maps MCP and A2A task identities across protocol boundaries while preserving state, authority, and expiry information
Price / call$0.004
Success—
StatusUnknown
How this service works
Map MCP and A2A task identities without losing state, authority or expiry
Output
Returns a mapped task record containing the translated task identity for both MCP and A2A protocols, the preserved task state, authority claims carried across the protocol boundary, and synchronized expiry metadata — ensuring no loss of context during inter-protocol task handoff.
Example use cases
Cross-protocol task handoff between agents
“I'm passing a task from our MCP orchestrator to an A2A agent and I need the task ID, current state, and authority claims mapped across correctly — can you bridge task ID mcp-task-7f9a to its A2A equivalent without dropping the expiry?”
Preserving authority during protocol migration
“We're migrating our agent pipeline from MCP to A2A and I need to carry over the authority tokens and task state for task mcp-9c3d — make sure nothing is lost in translation when you bridge it to A2A format.”
Multi-agent workflow task identity sync
“Two agents in our workflow — one MCP, one A2A — need to reference the same task. Bridge task mcp-task-00f2 so the A2A side can pick it up with the same state and expiry still valid.”
Technical details
Endpoint
POSThttps://phion.systems/v1/paid/trust/mcp-a2a-task-bridge?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an agentic workflow must hand off or share a task between an MCP agent and an A2A agent without losing task state, authority, or expiry. It is the right choice when cross-protocol task identity consistency is a hard requirement — for example, in multi-agent pipelines, protocol migrations, or federated agent systems where both MCP and A2A participants must reference the same logical task.
Side effects
- Invalid or expired MCP/A2A task ID returns a mapping error
- Mismatched authority claims between protocols cause a conflict rejection
- Expired task expiry on input results in a rejected bridge request
- Malformed input schema returns a validation error
- Unknown protocol version or unsupported task format returns an incompatibility error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| outputrequired | object |
Output
Schema · Response
{
"type": "json"
}Tags
x402
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