First Dollar Test
What this MCP does
Runs a USDC payment challenge with x402 enrollment, answer submission, payment polling, and reward or refund receipts.
Tools
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['clientToken', 'termsVersion', 'idempotencyKey'], 'properties': {'discovery': {'type': 'object', 'properties': {'mode': {'enum': ['autonomous', 'human_handoff', 'unknown'], 'type': 'string'}, 'selfReportedChannel': {'enum': ['google', 'mcp_registry', 'a2a', 'x402_discovery', 'direct_url', 'human_handoff', 'unknown'], 'type': 'string'}}, 'description': 'Optional caller claims. MCP transport does not prove Registry discovery or autonomous intent.', 'additionalProperties': False}, 'clientToken': {'type': 'string', 'pattern': '^[0-9a-fA-F]{64}$', 'description': 'Private run capability: generate and save 32 random bytes before creating a run. Never put it in a URL or public trace.'}, 'termsVersion': {'type': 'string', 'maxLength': 80, 'minLength': 1}, 'idempotencyKey': {'type': 'string', 'pattern': '^[A-Za-z0-9_-]{8,128}$', 'description': 'Persist 8–128 safe characters before calling. Reuse the key with the identical request after a timeout.'}}, 'additionalProperties': False}
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['runId', 'clientToken', 'paymentSignature'], 'properties': {'runId': {'type': 'string', 'format': 'uuid'}, 'clientToken': {'type': 'string', 'pattern': '^[0-9a-fA-F]{64}$', 'description': 'Private run capability: generate and save 32 random bytes before creating a run. Never put it in a URL or public trace.'}, 'paymentSignature': {'type': 'string', 'maxLength': 24576, 'minLength': 1, 'description': 'Caller-created x402 v2 PAYMENT-SIGNATURE value for this run. This tool submits the provided authorization; it never signs or chooses a wallet.'}}, 'additionalProperties': False}
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'properties': {}, 'additionalProperties': False}
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['runId', 'clientToken'], 'properties': {'runId': {'type': 'string', 'format': 'uuid'}, 'clientToken': {'type': 'string', 'pattern': '^[0-9a-fA-F]{64}$', 'description': 'Private run capability: generate and save 32 random bytes before creating a run. Never put it in a URL or public trace.'}}, 'additionalProperties': False}
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['runId', 'clientToken'], 'properties': {'runId': {'type': 'string', 'format': 'uuid'}, 'clientToken': {'type': 'string', 'pattern': '^[0-9a-fA-F]{64}$', 'description': 'Private run capability: generate and save 32 random bytes before creating a run. Never put it in a URL or public trace.'}}, 'additionalProperties': False}
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['runId', 'clientToken'], 'properties': {'runId': {'type': 'string', 'format': 'uuid'}, 'clientToken': {'type': 'string', 'pattern': '^[0-9a-fA-F]{64}$', 'description': 'Private run capability: generate and save 32 random bytes before creating a run. Never put it in a URL or public trace.'}}, 'additionalProperties': False}
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['runId', 'clientToken', 'idempotencyKey', 'answer'], 'properties': {'runId': {'type': 'string', 'format': 'uuid'}, 'answer': {}, 'clientToken': {'type': 'string', 'pattern': '^[0-9a-fA-F]{64}$', 'description': 'Private run capability: generate and save 32 random bytes before creating a run. Never put it in a URL or public trace.'}, 'idempotencyKey': {'type': 'string', 'pattern': '^[A-Za-z0-9_-]{8,128}$', 'description': 'Persist 8–128 safe characters before calling. Reuse the key with the identical request after a timeout.'}}, 'additionalProperties': False}
Recent tool changes
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